Ma Yun
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Practice Problems (2249):
Practice:
Prime Generator, Transform the Expression, The Next Palindrome, Factorial, Small factorials, Pouring water, Marbles, Highways, Ordering the Soldiers, The Game of Crosses & Crosses, Poker, Mixtures, Bytelandian gold coins, Ambiguous Permutations, Enormous Input Test, Sums in a Triangle, Simple Sorting, Not a Triangle, GCD2, ATM, The Rise and Fall of Power, Packing the Boxes, A Christmas Pizza Puzzle, Johnny and the Beanstalk, Paying up, Product of divisors, Battleship V, Life, the Universe, and Everything, Squash the Bugs, Paying up, The Rise and Fall of Power, Prime words, The Lucky Draw, Pack the balls in a box!, Team Selection, Lights Off, Revisited!, Golf course, Nuclear Reactors, Prime Palindromes, The Lead Game, Permutation Cycles, Discrepancies in the Voters List, A puzzle game, Modulo, The N Queens Puzzle Revisited, The LCS Problem Revisited, The Best Box, Plant Location, Anagram, Palindromic Subsequences, Tourist, Array Transform, Genetics, Robot Game, Multiples of 3, Maximal crosses, Gravel, Reduce string, Adding Least Common Multiples, Randomly Testing Circuits, Fetching Cooking Tools, Byteknights and Byteknaves, A New Number System, Cutting Recipes, Number Game Revisited, Count Relations, Chef attic window, Milestones, Coloring Colorable Graphs, Holes in the text, Breaking Into Atoms, Three Way Communications, Cutting Rods, The Route, Palindrome Palindrome, Rectangles Counting, The Great Wall of Byteland, Cipher Text, Parade, Frosting Cupcakes, Chef Teams, Large Kitchen, Infinite Grid Game, Dish Distribution, PDS Number, Pattern, Evil Book, Generalized Arithmetic Progression Free Sequence, Team Formation, Chef Travel Routes, Sum of Factors, Mr and Mrs Ant, Subanagrams, Houses and Restaurants, Graph on a Plane, Lucky Sum, Lucky Array, Ciel and A-B Problem, Dynamic GCD, Lucky Long, Home Delivery, Count of Maximum, Spoon in Matrix, Fit to Play, Daily Train, Xor it, Is it a tree, Jewels and Stones, Find a special connected block, Substrings on a Tree, Little Elephant and Strings, Stacking Pancakes, Lucky lucky number, Secret Treasure, Little Elephant and Candies, Little Elephant and Movies, Little Elephant and Mouses, Top Batsmen, Remember the recipe, Lights, PRIME, Little Elephant and Exams, Kisses & Hugs, Little Elephant and Bombs, My Fair Coins, The Gray-Similar Code, Arranging Cup-cakes, Event Organizer, Closing the Tweets, Prime Permutations, Connecting Soldiers, Delivery Boy, Racing Horses, Ciel and Receipt, A Wonderful Chocolate, The New Scheme, Granama Recipes, Coin Flip, Carvans, Buy1-Get1, Tourist Translations, Different Trips, N Queens, Little Elephant and Permutations, Buying Sweets, Equalization, Rat Maze, The Minimum Number Of Moves, Arithmetic Progressions, Pizza Delivery, Barcelona Gameplay Tactics, WordNinjas, Subset Sum, Expected Greatest Common Divisor, Packaging Cupcakes, Chef of the Year, Vacation, Approximately, Queries on tree again!, Three Different Numbers, Cipher, Palindrome, Prime or not, Fire Escape Routes, Row and Column Operations, FOOTBALL MANIACS, Perfect Square, Almost Prime, A OR B, Another Factorial Problem, Name Reduction, Your Name is Mine, Andrew and the Meatballs, Andrew and the Strings, Count Special Matrices, Andrew and the Meatballs again, Lapindromes, Cool Guys, Furik and Rubik and Sub Array, Chef and Segments, A Plus B Again!, Maxim and Dividers, Sereja and Commands, Count K-Primes, Attic Crossing, Online Shopping, Sereja and Transformation, Prime Distance On Tree, Splitting Candies, CAO Stage-3, Pairwise AND sum, Entangled Strings, Chef and The Colored Grid, Chef and The Right Triangles, Chef and The Divisibility Queries, Fibonacci Number, Kamehameha, Big Number, Game Of Thrones, Polo the Penguin and the Numbers, Polo the Penguin and the XOR, Uncle Johny, Missing some chairs, Statues, Lucy and Palindromes, Chefs in Queue, ATM, Number Mirror, Am I a Fibonacci Number, Magic Pairs, Reign, Rectangular Queries, Query on a tree VI, Perfect Subarrays, Counting Matrices, Please like me, Chef and Feedback, Stairway Reduction, Longest Common Pattern, Little Elephant and Subarrays, Farmer Feb, Chef and the Cake I, Chef and Shop, Chef and String, Chef and Numbers, Compilers and parsers, Walk, Chef and Magic Arrays, The Street , Counting Bits, Durins Day, Sherlock and Inversions, A Story with Strings, Chef and Remissness, Chef and Reunion, ABC-Strings, XOR Minimization, 3-Palindromes, Sereja and D, Chef-jumping, Little Elephant and T-Shirts, Dividing Stamps, Divide the Tangerine, Chef and Reversing, Chef and Chain, Chef and Digit Jumps, Chef and Rainbow Array, Chef and Strange Matrix, Chef and Subarray, Shortest Path in Binary Trees, Chef and Swaps, Chef and Left-Right, Ups and Downs, Stone, Count Substrings, Maximizing Marks, Game of Numbers, Queries on the String, Sherlock and the Grid, Coprime Triples, The Smallest Pair, Dynamic Inversion, Subarray GCD, Subarray LCM, Fibonacci Numbers on Tree, And Operation, Shift The String, Lowest Common Ancestor, Simple Editor, Rectangle Query, Copy-Paste, Chef and Gift, Chef and Array, Fun with Rotation, Divide or die, Dragonstone, Children Trips, 2048, Chef and Strange Formula, Tanu and Head-bob, Servers, Updating Edges on Trees, Chef and easy problem, Chef and easy problem 2, Chef and medium problem 2, Bye, inversions!, Spiderman and Jumping, The Dirty Path, Distinct Characters Subsequence, Chef and A Large Permutation, Chef and Notebooks, The Army, Walk on the Axis, A game of consecutive piles, XOR with Subset, The Problem Set, Let us construct palindrome, Chef and Churu, Course Selection, Mangalyaan-2, Mahesh and his lost array, Sereja and Salesman, Chef and Apple Trees, Cascading Style Sheets, The last cracker, Discount on crackers, Jai Hanuman, Sereja and LCM, Covering Sets, Brackets, Chef and Keyboard, Chef and Problems, Zombinatorial, Parenthesis with Maximum Sum Subarray, Cultural Programme, Charlie and Prime Numbers, Sereja and Votes, Xor Queries, Ranka, Interview Scheduling, Good Joke!, BlindDate Contest, Fit Squares in Triangle, Piece of cake, Vogon Zoo, Road Decoration, Matryoshka Dolls, Gabba sprint, Suraj goes shopping, Xor Matrix, Equilibrium number, Chef and Interview, Lucky Four, The Warehouse, Broken Telephone, Median, Jerry in a trap, Fibonacci, Chef and Prime Divisors, Exam, Chef and Polygons, Set Difference , Palindrome, ATM, Palindromeness, Flip Flops, Lucky and Arrays, Equality, Version Control System, Prime Palindrome Sum, Euler Totient Function Extended, Tickets, Bank and vulnerable passwords, Counting Primes, 3D Queries, Counting on a directed graph, Strange Race, Laboratories, Zeroes, Na2a and lucky stone, Rohith and Circles, Devu and Grapes, Add Two Numbers, Find Remainder, First and Last Digit, Smallest Numbers of Notes, Sum of Digits, Reverse The Number, Helping Chef, Total Expenses, Id and Ship, Valid Triangles, Grade The Steel, Gregorian Calendar, GCD and LCM, Second Largest, Small Factorial, Primality Test, Finding Square Roots, The Block Game, Farmer And His Plot, Wrong Answer, Chef and Dolls, Chef and his Sequence, Nikitosh and xor, Devu and friendship testing, Rupsa and the Game, Train Partner, Cops and the Thief Devu, Maximize Disjoint Pair Sum, Intervals and subarrays, Chef and Table Tennis, Strange operations, Easy exam, Chef and Bitwise OR Operation, Greedy puppy, Chef and Sets, Race Time!, Simple Queries, Chef and Path, Code Land, Receipt Recovery, Forgotten Language, Spheres, Chef and the Cards, Chef and the XORed Number , Chef and the Number Sequence, Chef and the Wildcard Matching, Capital Movement, Make Palindrome, Minimum Maximum, Easy Queries, Pattern matching, Sum of palindromic numbers, The Gift Of Raksha Bandhan, Super Numbers, Chef And Operators, Jump mission, Simple Sum, Are You Lucky, Cyclist Race, Plane Division, Period on tree, Decompose the Tree, Counting Zigzag Sequences, Mahasena, Poker Chips, Bhallaladeva, Finding Hardest Sum Value, Just Update and Print the array, (Challenge) Chef and Palindromes, Processing a string, Chef and Tetris, Mutated Minions, Ancient Berland Roads, Chef and Destruction, Chef And Palindromes, Matched Brackets, Wormholes, Matched Brackets 2, Distinct Codes, Palindromic substrings, Sereja and Line, Sereja and Array and Subtracting, Sereja and Pairs, Prime or Not, Chef and Pick Digit, Chef and Time Machine, Chef and Subarrays, Chef and Queries, Chef and LCS, Cat and Mouse, Chota Mouse and his birthday cake, Longest Palindrome, COINS, Longest Common Subsequence, Chef and Fruits, Social Network, Malvika is peculiar about color of balloons, Animesh practices some programming contests, Jumble Dumble, Chef and digits of a number, Digital clock, Dual Nim, Strange Functions, Alternating subarray prefix, Largest Number, Faded Palindromes, Fullmetal Alchemist, Puppy and Board, Chef and Coins Game, Chef and Three Dogs, Puppy and Sum, Chef and Chocolate, Chef and cities, The Inversions, Forest Gathering, Two Closest, Simple Statistics, Get AC in one go, Asya & Beautiful Strings, Ada and crayons, Total Palindromic Numbers, The potato problem, Simple Sum, Dragon Warrior, The Closest Vertex, Cyclothon, Cab Service, Chef And Coloring, Maximum K Sums, Help with selection, Summer Internship, Probability, Ilya and Sleep disorder, Vasya and Little Bear, PrePre, Movie Weekend, Polygon, Daddy and Chocolates, The Bracket Problem, Chef and Round Run, Game Theory, Cats and Dogs, Laddu, Coins And Triangle, Very Simple Question Returns, Akhil And Colored Balls, Tandem, Devu and an Array, Evaluate the polynomial, Funny gnomes, Primitive Queries, Kitchen Timetable, Floor Division Game, Sticks, Chef and Sad Pairs, N different palindromes, Different Neighbours, Chefland and Electricity, Beautiful Sandwich, Alliances, Chocolates for Everyone, One more weird game, Range Minimum Queries , Coloring A Tree, Defend the Recipe, Good Numbers, Chef and Proportion, Chef and Numbers, Tweedle-Dee and Tweedle-Dum , Drumpf for President!, So Close Yet So Far, Quadruples, Print It, If - Else Problem, Digit Longest Increasing Subsequences, Studying Alphabet, Matrix Transformation, Cute Prime Love, Sorting Tool, Completing favorite game, Take Turns, Kth Max Subarray, Sahil The Anime Lover, JARVIS and LCP , Raymond And Network, Lazy Jem, Write a program to reverse an array or string, Chef and Words, Zack And The Handkerchieves, Find The Factos, Torque and edges, Batman v Superman, The Reverse Game, Prime Numbers, Watson asks Does Permutation Exist, Sherlock Counts Ways, Candy Game, Luther and Brackets, Chef and Roads, ChefWatson uses Social Network, Task for Alexey, A walk on a grid, Exponential Deal, Prison Break, Help Lost Robot!, Beautiful Arrays, Watson and Digit Sums, Colorful Grids, Chef and Bipartite Graphs, Query On Strings, Query On Arrays, Download file, Mr P and his Friend, Rangoli pattern, Kirito in labyrinth, Proper Divisors, Test the Year, Pattern Problem, Fibonacci, Remove Duplicates, Fluffy and Tree Distance, Tree Height, Visiting Friends, Evil Chris, Chef and his Students, Tom & Jerry, Parhi And Multiplication, Chef and Subset, Chef and Queries, Finding Seats, ACM ICPC World Finals Accommodation, Voting Fraud, Alice and Bob play Contact, The Saviours, ATM queue, Bob vs ATM, Extreme Encoding, Quentin Tarantino, Employee Voice Surveys, MST Queries, Reservior, Nothing in Common, Pattern, Digit Longest Increasing Subsequences 2, Sum of distances, Mixing flavors, Chef and His Apartment Dues, Xenny and Alternating Tasks, Cooking Game, Transpose Matrix, Bear and House Queries, Next Permutation, Bear and Extra Number, Bear and Milky Cookies, Bear and Cat Trap, (CH) Bear and Sorted Rows, Bear and Oveflow Points, Number Tower, Maximum of Three Numbers, Second Max of Three Numbers, Chef the Brave Warrior, Hogathon, Yet Another Card Game, Golu and Sweetness, Sorting Problem, Long Sandwich , Bear and Ladder, Tree Obsession, Chef and Prime Queries, Stable market, Pishty and tree, Bear and Row 01, Similar Dishes, Rhett and Link, Bear and Shop Trip, Bear and Candies 123, Bear and AB, Factorial Problem, Flash vs QuickSilver, Strange Batman, Minimizing the dot product, Bear and Segments, Joey and food, Closest points queries, Bear and Segment 01, Chef and his daily routine, Median of adjacent maximum numbers, Chef and Subsequences, Triplets, Snake Procession, Snake Eating, Temple Land, Prefix Inversions, Hasan and boring classes, Add or Multiply, Robots in a DAG, Harry and magical number, Two Numbers, Chang and Bitwise OR, Chang and Perfect Quadruples, Hit the Coconuts, Chef and Isomorphic Array, Whats in the Name, Calculator , Walks on the binary tree, Boss and his Brother, Good Pairs, Jon Snow vs White Walkers, Palindromic Game, Sum of Cubes, Flower Pots, Weasel does Xor on Tree, Difference array, Fill The Matrix, From heaven to earth, Product on the segment by modulo , Mathison and pangrams, Max Mex, Queens Landing, Little Chef and Sums, Chef Hates Palindromes, Fast Exponentiation, Chef and 2D Array, Chef and Cook-Off Contests, New Game, Bits, Praveen, Modular GCD, Chef and Employment Test, Minimum SubArray, Periodic Palindrome Construction, Modulo Equality, Ordering teams, Villages and Tribes, Days in Month, J - Reached Safely Or Not, Prime Factorisation, Matrix Median, Chef and Deforestation, A - Appearance Count, Skiing, Chef and XOR Queries, Random Pair, I - Secrets, D - Triangle Count, L-R queries, Strange Queries, Chef And his Cake, Lucas Theorem, Method Resolution Order, Four Friends, Spanning Tree, Chef And Land Labeling, Good and Bad Persons, Uniform Strings, Generating A Permutation, Coupon System, Proprietary Probabilistic Problem, Quadratic Functions, Football Match, Large Sum, Nested Candy Boxes, A Few Laughing Men, Coder Life Matters, Poetic word, Chef at the Food Fair, Maximum Score, Chef Cuts Tree, Rectangle, String Merging, Anupam and Raja, Minimum Maximum Partition, Partition the numbers, Hello World, Multiple of 3, Smallest To Square, Multiply the Array, Geometric Progression Triplet, Easiest Problem, Max Subarray (keteki), Chef And His Characters, Survive in ChocoLand, Chef and odd queries, Save Patient, Mighty Friend, Cutting Plants, Chef and Gcd Queries, Problem 3, FORM BIGGEST NUMBER, A Big Sale, Permutation and Palindrome, Chef and Cook-Off, Chef and Tuples, Chef and Line, CAPTAIN M & ARMY, Smaller than the element, Game with numbers, Jumping in the hills, Electron Base, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas, Spiral Matrix, HYPER ADI, Z Value, Chef Judges a Competition, VK and NCR, Mussadi lal and stairs, Correct Bracket Sequence, DP Made Easy, Chef and Same Old Recurrence, Partitions, Rahul and his encryption, Magic Elements, Workers, Good-Bad Pair, The Deadly Sin, Candy Love, Reverse String, Killing Zombies, Convergence, Cut the Board, Binary Nim, Two vs Ten, Rubber Band, Dibs on Fibs, Sheokand and String, Naive Chef, Trace of Matrix, Weak in the Middle, Maximum Plus, Code Stats, UnAble to decipher, Family Tree, Sum OR Difference, Decrement OR Increment, Area OR Perimeter, Program Your Own CALCULATOR, Is it a VOWEL or CONSONANT, Prime Numbers, Archi and Comparsion, Good Permutations, Coin Denominations, Summary Power, Counting Pretty Numbers, Big Multiplication, Chef and Market, Encoding Message, Split Stones, Chef and Bored Games, Spell Bob, The Array Problem, King of Chefland, Prime Game, Doubly Linked List, The Great Run, Kill them with your success, Left Right Print, GukiZ and Candies, Magician versus Chef, Find the prefix sum, Balsa For The Three, Chef and Problem Setting, War of XORs, Sacred Game, Chef and Eid, Chef and Adventures, Ada School, Leap year, Bad Shuffle, Appy and Balloons , Chef and Serves, CRYPTOGRAPHY SYSTEM, ATM Machine, Make a Permutation, Chef and Circles, Query on Array, Chef and Ridges, Judging Delay, Finding Teammate, Qualifying to Pre-Elimination, Chef and Operations, Chef and SnackDown, Chef and Semi-Primes, Chef and Strange Addition, Pumping Water, Chef and Typing, A Game of Robots, A Family of Bipartite Graphs, Reduction Game, Appy Loves One, Three Friends, Robots Again, Coloring the Grid, Chef and Sequence, Chef and Difficult Contests, Chef and Happiness, Spectacular Activity Selection, Truth and Dare, (Challenge) Delete DAG, Colorblind Feast, Cutting Pizza, Useful Number, Maximize It, Chef and An Ideal Problem, Mafia Syndicate, Maximise the Sum, Lucky Number Game, E - Make it Zero, A Triangle and Two Squares, Count Periodic Numbers, Play Piano, 1-2 Game, Pseudo Sorting Algorithm, Flipping Polygons, Life Limited, Three Strings, Fighting Armies, Magic School, Beauty of Konoha, Get a Bucket of Water, Do You Want to Build a Snowman, Valid Stack Operations, XOR! Wait for it, Palindromic Walks, Sherlocked String, Return of the Gargoyle King, Print Pattern, Ross goes for Shopping, Summation over nCr, Distinct Pairs, Fancy Quotes, A Pizza Slice, Yash Goes to Bank, Philosophers Stone, Shivigawdz, Grouping them right!, Ada King, Jungle Safari and the Boat, Manhattan Rectangle, Rooks, Bus Station, Offer for Chef, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Yet Another Tree Problem, Man with No Name, Mayhem Again, Art of Balance, The Great Lane, Friend, Hex Prime, IPL and RCB, Chef and Secret Password, Buying New Tablet, Chef and Party, The spy machine, Beginner, Average Number, Yet Again a Subarray Problem, Paths, Chef and a Beautiful Digit, Even Odd, Large Factorial, Range Sum Problem, (Challenge) Interleaving Strings, Hello World, UEFA Champions League, KorbiosGrid, Playing with Numbers, FlatLand, Maximum Remaining, Earning A Profit , Chef and Football, Subtree Removal, Fencing, Edgy, Corrupted Seven-Segment Display, Testing Robot, Partition into Permutations, Game of Theory, Go Round, Danny Wants To Know, Find The Sum, Building Stairs, Long Long Sum, Solve The Case, (Challenge) Chef Exchange, Making a Meal, Chef Learning Hungarian Algorithm, Chef and Good Subsequences, Reduce to One, Road Signs, Count Arrays, Guddu on a Date, Attendance, Fast Food, Minimum Sum, Chef and Ingredients, Chefina and Ranges, Encoding, Sum and GCD, Forgotten Tree 9, Friend in Need, Bitsetbaba and Power Grid, Reverse Maximisation, Searching for a Biclique, XOR Magic, Codechef War, Easy Fibonacci, (Challenge) SnackDown 99, Chef and Distinct Numbers, Raghu Strings, Eat Twice, Ping Paja Pong, Chef and Mean , Magda and Silly Pairs, Football, Distribute Apples, Birthday Gift Again, Playing with Strings, Fuzzy Linear Combinations, Police and Thieves, Delete a Subarray, Easy Math, A - Books, E - Guess the Number, B - Candy Love, Smallest Beautiful Number, Save Konoha, Power Sum, Prajit and bits, Rich Substrings, Chef and Interesting Subsequences , Plus Multiply, Count the K-tuples, XOR CIRCUIT, Bits Magic, Inversions in an array, Sugar Rush, SPY NUMBER, PLAY WITH MATRICES, Binomial Fever, Operations on a Matrix, Phone Prices, Playing with Matches, Weird Modulo Problem , Faulty System, Student of the year, Yet Another Partition Problem, Children and Candies, Weapon Value, Pen Pineapple Apple Pen, Colliding Balls, Discount in a Shop, XOR Engine, Medel, Select Training Set, (Challenge) Coloring Triangulations, Full Barrier Alchemist, The Promised Land, Naruto Run, Printing Pattern using loops, Box Game, Counting Inversions Revisited, How much Scholarship, Stick and polygon, Odd Topic, Balanced Brackets, Chef Diet, Robots in Chefland, Planting Trees, (Challenge) Cubical Virus, That Is My Score!, Pizza or Broccoli , C - Recover Array, Nth Fibonacci Term, Maximize Diversity of an Array, Beauty and The Array, Is This a Give Away, B - Prime-partite Graph, IPL Begins, Disconnecting Cities, Yet Another Balanced Parenthesis Problem, Break, Telephone Network, Ada Bishop 2, Safe Robots, Change It, Purify It, Usain Bolt vs Tiger, K-Prob, Walk 4 steps, Rotate String, Polygon Containment, Sufficiently different string, Mortgage, Rooted Tree Graph, The Evil Professor, Expected Candies, Guess the number, Ruman and Pull Requests, Chef and String, Chef Chick, Exam Cheating, Maximum Subsequence Sum, Squared Subsequences, Sky Watching, Profitable Paths, Bitwise Operators, Exploring Undiscovered Planets, Winning Ways 2, Recruit Villagers, No Change Required, Range AND, Chefina and Sums, Psertu in Byteland, Lasers Everywhere, Buying a New String, An AC for you, Bob and His Friends, Chef and Street Food, Chefina and Swaps, Hard Cash, (Challenge) Raisins, XOR Game, Triangular Pyramid, Sweetest Candy , Lavanya Loves DFA, Prefix sum, 1 - Nights Watch, Check Prime, Penalty Shoot-Out II, Tax Slabs, Valentines Day, A Leisurely Journey, Button Pairs, Joined Subarrays on Tree, PERFECT_PRODUCT, A - Tom & mouse traps , Find maximum in an Array, Mercury Poisoning, Chef and Stocks, Optimal Memory Address, Egg-free DAG, Binary Land, Painter Problem, At the Gates, Not All Flavours, Unit GCD, Find Your Gift, Maximize Letter Beauty, Paleontology Museum, Escape the Tree , Easy Geo xD, Chef and Dragon Dens, Cool Subsets, Coronavirus Spread, Sell All the Cars, Naruto and Rectangles, The Typist, The idols of MahaBaleshwar, Lazy Carter, COVID Pandemic and Long Queue, Harry and chocolates, 6 - Product of Minimums, Simple Operations, Missing a Point, Lockdown Loss, Balls, Final Exams, Amal’s Business, Bob wants Cookies, Chef learns Statistics, Maximum AND, Naruto and Chunin Exams, Greedy DD, Shortest Palindromic Substring, Another Birthday Present!, GCD OF TWO NUMBERS, SIMPLE MODIFICATION, GODFATHER, Chef and Numbers, Isolation Centers, Creating New Mathematical Tasks, Chef and Recipe, Chefina on a Trip, The Tom and Jerry Game!, Lord Ram and XorOrXorOr Power, Play with 2D Array, Weird Algorithm, Chef and Icecream, Economic Inequality, Chef and String, Weird Walk, Lost Weekends, candies, Expected Repetitions, Chef and Price Control, A Problem on Sticks, Doof on Cartesian, Distribute Candies, Increasing Decreasing, Gold Mining, 1 - Cakezoned, Pattern printing, Tower of Hanoi, Chef and Card Game, MEX-ception, The In-XOR-able Task, Even-tual Reduction, OR-thodox Distinction, Cherry and Bits, Priya and AND, Chef and Steps, Find XOR, Dr Phil goes to the ranch, Maximum Candies, Coloured Pairings, Binary Concatenation , Smallest KMP, Game on a Strip, Chef and Wedding Arrangements, 2 - Sums divisible by 3, 3 - Domino game, Counting Graphs, Mode of Frequencies, Elevator, Coronavirus Spread 2, Bowling Strategy, GCD operations, Root the Tree, Zenny and Simple Sum, Binary String MEX, Watermelon, Inversions, Replace for X, Chef and Covid, Compress all Subsegments, Covid Run, Hail XOR, Split the Str Ing, Decreasing Srrnmieeda, Path-etic Sums, Sum Of Array Elements, Yet Another Crossover Episode, AND Plus OR, Los Pollos Hermanos, Chef and Subtree MEXs, The Chosen One, Chef Is Just Throwing Random Words, Hunting Race, Kaneki and Mysterious Item, Climbing a staircase, Multi-threading Merge Sort, Area of Largest Rectangle, Chef and The Lockdown, Frequency Array, Birthday of Anabelle, Compartment Weights, Print Sub-Array, Jump & Reach, Flip the String, Chef and IPC Certificates, Hiring Workers, CHEF GOES FOR A DATE, Armstrong Number, Xor Compare, Gasoline, Fractions, Polite numbers, Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution, Organisation, Array Swaps, Efficient Delivery, Hidden Numbers, Catch the Thief, Angry Cyborg, The Begining Era Of Cyberverse, Three Letters, Parallel Universe, Status and Updates, Minimum Attendance Requirement, 10 Try Brute-force first, Find Steps, Batteries Needed!, One Zero Swaps, And-Or Game, Maximum Value, Valid Paths, Alien Invasion, Bodybuilder, Chef and Division 3, Point Of Impact, Encoded String, Cleaning Drive, Chef And Strings 2, Daanish and Problems, Chef and Groups, Ashishgup and Interviews, Chef and Meetings, Not Too Colourful, Maximum Size, Find Second Largest, Coin Game, College Life 2, Distinct Pair Sums, College Life 5, Maximise Islands, XOR Sums, Maximise Function, Buy Please, Special Fibonacci, Solve This, Minimum operations, Chef and Tourism, Pair Me, 3 - Good Grid, Even Sum, Lockdown, Highest Divisor, Welcome to the world of CP, Hello, CodeChef!, Body Mass Index, Paparazzi Gennady, College Admissions, Substring Probability, Fun Maths, Infection, Valid String, Consecutive Deletions, Smallest Possible Whole Number, Coprime Range, Chef and Coupon, No Time to Wait, Breaking the Fence, Water Transfer, Nobel Prize, Motivation, Pawri Meme, Matrix XOR, More Friends, Weight Balance, Lucky Four, Possible Victory, Make the Sum Even, Birthday Gifts, Lunchtime, Valid Pair, Strong Language, Boolean Game, Passing Marks, Chef On Island, The Last Problem, Chef in Heaven , Hiring Test, Bench Press, Lucky String, D - Pilgrims Destination, E - Minimum Operation, F - Stone Land, Encode Kalakeya, Tree Distances, OR of ANDs, A - Save Water Save Life, Tree House, Chocolate Monger, Pizza Party, Equinox Strings, An Interesting Sequence, Shortest Route, Xor Equality, Magical Coins, Coldplay, Hoop Jump, Solubility, Beautiful Ranges, Bitwise Tuples, Tom And Jerry 1, Double Burgers, Bella ciao, False Number, Lazy Chef, Chef and Subarrays, Correct Sentence, Total Components, K-Subarrays, Dual Distance, Summer Heat, ICPC Balloons, Chefland Visa, Richie Rich, The Wave, Chef and Queries, Cyclic Quadrilateral, Maximum Production, Tic Tac Toe, Chef and Pairs, Different String, Even tuples, Range Array, Odd bits, pattern type-1, advance pattern, Chef and Closure, Chef and Spells, Three Dices, Equal Difference, Maximal GCD, Beautiful Pairs, XOR-ORED, Chef and Bulb Invention, Cricket Ranking, Shoe Fit, Chess Format, Shuffling Parities, Food Chain, Red Alert, Interesting Representation, move negative element , Positive Spewing, Longest Good Segment, Bad Luck, Problem Difficulties, Olympics Ranking, Jon and Selina, Javelin Qualification, Penalty Shots, Say No To Drugs, Large Square, Bus full of passengers, India Fights Corona, Chef 2 Chef, The Rumbling, Clear the Array, Which Division, Team Formation, Odd GCD, Maximum Length Even Subarray, Programming Languages, Min-Max Path, Just a Graph, Hardest Problem Bet, Odd Repeat, Tree Distance Sum, 2-D Point Meeting, Airline Restrictions, Travel Pass, The Old Saint And Three Questions, Longest AND Subarray, K - balanced string, Digit Removal, The Grid Fill Problem, Find the Direction, Obtain the Sum, The Two Dishes, Tsetso Subarrays, Add and Divide, Cars and Bikes, Zebra Crossing, Good Weather, Fake GCD, Adjacency Hatred, Subsequence LCS, Make it Divisible, MEX-OR, A Subtask Problem, Three Boxes, Two Dishes, Prefix Sums, Chef in Vaccination Queue, Vaccine Dates , Alice vs Bob Faceoff, Maximum Light Up, The Preparations, Professor And Directions, Chef And Salary Pay, Interesting Pairs, Yet another SOD problem, Maximizing Minimum Segment Sum, Magical Doors, Diagonal movement, Drunk Alcoholic, Maximum Damage, Which Mixture, FIXFIX, Counting Tuples, RCB and Playoffs, Cool Name, CODE3, Nice Pairs , Gold Mining, Print The Pattern, Lucky Number, Maximum Number Of Distinct Elements, Test Match Series, Alternating Work Days, F - Pair Sum, Dance Moves, Pass or Fail, Tree Upshot, Min Max LCM, Chef and Water Car, Exactly N plus 1 Values, Odd Sum, Average Flex, Flip or Compress, Problem Category, Chef Pizza Delivery, Weird Palindrome Making, Equal Coins, Which Fuel is Cheaper, Binary Inversion, The One with Russ, String Game, Partition It, Chef on Vacation, New Piece, Break And Fix The Tree, Can_Reach, Odds and Evens, Can You Eat It, Make it Divisible, Palindromic Binary Numbers, Back to Campus, Make them equal, The One Where It All Began, Minimum Number of Pizzas, Min-Max Rotations, Chef and Stock Prices , Permutation Pairs, Again XOR problem, Check Mate, Rock Paper Scissors, Pyramid Traversal, List of Lists, Remove Element, Car Range, Game between friends, Maximum Factors Problem, Chef and Contest, Sleepy Chef, P Equal To NP, Marbles, Indivisible Permutation, Median Minimization, The Alternating Sum, Distinct Elements, Avoid Fixed Points, The Squid Game, Destructive Nim, 1111---- !, Stable Sequence, Genes, Chef and Pal, Red Light, Green Light, String protocol, Plusle and Minun on Array, Two Rooks, Ticket Machine, Keplers Law, Friends Meetup, World Chess Championship, Chef Loves 1010, Equal Integers, Subarray permutations, Maximum Trio, Romantic Reversals, Sequence Master, Devendra and Water Sports, Favourite String of Chef, Prime in a binary string, Vishesh and his Popcorn Combo, Sarthak and his Magic Grid, Covid Spread, Chef and Riffles, Mean Maximization, Non Zero Xor, Crying Colours, An Interesting Sequence, Mask Policy, TCS Examination, Merged LIS, Chef and Fixed Deposits, Boring Trip, Equal Card Game, Elections in Chefland, Average of Three, Swap the numbers, Chef and Profits, Subarray Mex, Anti Palindrome, Avoid Contact, Chef and Subset Additions, Chef and Lockout Draws, Permutation XOR Sum, pattern, Badminton Serves, Yet Another Constructive Problem, Equal MEX, N Queens Puzzle Solved !, Chef and the Hair Salon, Akash and Function, Points and Lines, Fit in Data Type, Chef and NextGen, PerMEXuation , Array Division, Careless Chef, Car or Bike, Valentine is Coming, Count the Notebooks, Hostel Room, Control the Pollution, Reverse Number, Distinct Binary Strings, Get Lowest Free, Too many items, Shopping Change, Complete the credits, Guess the bottom face, Lazy Salesman, Peaceful Party, Blackjack, The product mystery, Four Equidistant Points on a Grid, Good Program, Parallel Processing, Battery Low, Fill the Bucket, Tyre problem, Chef and Instant Noodles, Watching Movies at 2x, Chessboard Distance, Permutation Xority, Bomb the base, Self Defence Training, Magnet Sort, Car Choice, Qualify the round, Janmansh and Games, Janmansh and Coins, Janmansh and Assignments, Janmansh at Fruit Market, Subarray XOR, Substring of a Substring, Akash and Missing Class, Exact Marks, MEX on Trees, Alice and Marks, Integers that sum to the same value, Discus Throw, Bath in Winters, Wordle, Chef team, Minimum Coloring, Gift Shop and Coupon, Chef and Water Bottles, Swapping Chefs Way, Credit score, Chef and Chocolates, Chef and Races, Balanced Reversals, Increase IQ, Winter, Minimum number of coins, Chef and Brain Speed, Chef and Masks, CRED Coins, Separate Them All, The Three Topics, Alternating String, Sign Moves, Cup Finals, The Unchanging OR, Group Assignment, Economics Class, Maximize the Minimum, Binary String Cost, Volume Control, Finding Shoes, Flip Sorting, Avoid Alternating, Sasta Shark Tank, Rearranging digits to get a multiple of 5, Test Averages, Speed Limit Test, Bucket and Water Flow , Apples and Oranges, Chef and Chocolates, Course Registration, Digit Sum Parities, Max LCA Sum, Funny Hand, Email Reminders, Dazzling GCD Pair, The Cheaper Cab, Monthly Budget, Minimum Cars required, Non Adjacent Flips, Dazzling AXNODR Challenge , Ezio and Guards, Antipodal Points, The Cooler Dilemma 1, The Cooler Dilemma 2, Pairwise Xors, Is the Score Consistent, Good Quality Bulbs, Expiring Bread, Good Permutation, Lunchtime, Mario and Bullet, Pair Pain, Palindrome Pain, Water Requirement, Police and Thief, Chef And Division, Jenga Night, Candy Distribution, Bob at the Bank, Chef and Happy String , Equalizing Numbers, Six Friends, Best Coupon, Pseudo Sorted Array, Compress the Video, Buying Sweets, Who is taller!, Presents for Cheffina, Easy Permutation, Chef and Wire Frames, Array Equality, Chef and Chapters, Chef and Bird farm, Farmers League, Game of Pooks, The Mango Truck, Roller Coaster, Laptop Recommendation , Infernos, Sugarcane Juice Business, Football Cup, Miami GP, A Bit Easy, Chef gives Party, Get Subscription, Good Pairs, Dominant Army, Circular Track, Difficulty Rating Order, Practice makes us perfect, Subsequence-Numbers Divisible by 7, Equal After And, How many unattempted problems, Recent contest problems, Problems in your to-do list, My very 1st contest!, Even Subarray XOR, A or B, Xor Palindrome, Even Equal Odd, Chess Ratings, Score High, Total Prize Money, Make them Zero, Degree of Polynomial, Sort the Array, Doubt Support Availability, Whatsapp Messages, Take discount or Not, Is this priority or parity!, Path Parity, Parity Fun, Determine the Winner, Full Path Eraser, Simple XOR, The two numbers, Rating Improvement, Playlist, Break the Stick, First and Last, Split AND Sum, Max Minus Min, Divisible by 3, How Many Maximums, Age Limit, Equal Distribution, Minimum number of Flips, Chairs Requirement, Divisible by i , Possible GCD, Alternate Additions, Equal Strings, Zero Ones Equal One Zeros, The Optimal Pairs, Burgers, DNA Storage, Distinct Palindrome, Joining Date, Waiting Time, It is My Serve, Too many Floors, Determine the Score, Maximize Difference, Max Shift After XOR, Equal by XORing, Alternating Strings, Atleast and Atmost, Triple Xor, Dense Bracket Sequence, Biryani classes, Air Hockey, The Attack of Knight, Jogging, Xor and Multiply, Gcd and Lcm , Count the ACs, Make all equal using Pairs, Complementary Strand in a DNA, Reversal Sorting, Fitness, Prime Xor, Strong Elements, Chef and his Apps, Best of Two, Retrieve the Array, Adjacent Sum Parity, Change Row and Column Both, Bidding, Equal Subsequences, Enough Space, Xor Permutation, Chef Drinks Tea, High Accuracy, Journey of the Knight, Sort the String, Counting Words, MATH1 Enrolment, Group Assignment, Game of Piles Version 1, Find A, B, C, Slow Solution, Pass the Exam, Chef and Candies, Chef On Date, Copy and Push Back, Similar Heights, Construct N, End Sorted, Minimum Coins, Chess Time, Buy Lamps, Fill The Grid, Passes for Fair, Fill Candies, Interior Design, The Last Levels, Easy Pronunciation, True and False Paper, Largest Family, Positive array, Chef in his Office, To Divide or Not To Divide, Sum of Product 2, Insurance, Split The String, High Frequency, Is it hot or cold, Maximise the Tastiness, Monks, Valid Minimum, Air Blimp, Permutation GCD, Sum Product Segments, Bad Tuples, Discount, Nearest Court, Average Permutation, Split N, Copy and Paste, Final Population, Different Medians, TV Discount, Dominant Element, Tree of Trees, Sale Season, XOR with smallest element, Hello Equation, Two Trains, Maximum Submissions, Tree Coloring, AI Analysing Code, WA Test Cases, Air Conditioner Temperature, K-Flip, Maximal Prefix After Flip, Height of Rationals, Car Trip, Greater Average, Odd Pairs, Make A and B equal, Weights, Equal Distinct, Number of Credits, Ticket Fine, Balls and Boxes, Permutation Clear, Distinct Numbers, Fever, Mean and Median, Interesting Subarray, Good Pairs, K-Subarrays, Nearest Exit, Chefland Games, Maximize Colours, Sleep deprivation, Flip the cards, Equalize AB, Even Splits, Non-Negative Product, Two Different Palindromes, Increasing Addition, Bounded Spanning Tree, Break the elements, Ranklist Pages, Reach the Target, Remove Bad elements, Maximum Subarray , Suspense String, Confusing Concatenations, Audible Range, Expert Setter, Speciality, Podium Finish, Minimum Pizzas, Building Race, Single Operation Part 1, Single Operation Part 2, Yet Another Palindrome Problem, Tax in Chefland, Paper Cutting, Palindrome Flipping, Card Removal, Minimise LCS, Different Consecutive Characters , Weird Subarrays, Subarray Removal, Reach on Time, Odd Sum Pair, Strange BST, Sorted Substrings, Make Multiple, Final Sum, Pythagorean Pair, X Jumps, Max minus Min, Test Score, Nahaane Jaa, STAR Pattern, Maximize 1s, One-XOR Deletions, Packing Books, Make Length 1, Tasty Decisions, Avoid Squares Please, Maximum Angriness, Mario and the Broken String, Luigi and Uniformity, Range Assign, Number of Distinct Elements Minimize, Xor Array, Parity, Candies, Gormint Aunty, Distinct Colors, Water Consumption, Hackerman, Split and Maximize, Spliting Balls, Time Complexity, Water Mixing, String Game, Good Binary Strings, Palindrome by Splitting, Akash and Dinner, Just Like Mob!, Binary Battles, Squats, Monopoly in Chefland, Musical Rods, Expensive Steps , Minimum Number of Ones, Counting Problem, Tour of King, Boring String, XOR Product, Expense List, Rain in Chefland, Bull or Bear, Make AP, Make Money, Divisible by A_i, Gcd of Subarrays, Good Investment or Not, Reach fast, Maximise XOR, Scalene Triangle, Convert to permutation, Distinct Sequence, Kitchen Timings, Spice Level, Cost of Groceries, Strange Bitwise Operation, Pet Store, Prime Reversal, Frequency Array Retrieval, Flip the Prefix, Instagram, Facebook, Snapchat, Asymmetric Swaps, Perfect Trio, Maximizing LCS, Smallest Difference, Indivisible, N Triplets, Sum it, Find an integer, Chef Plays Ludo, Multivitamin Tablets, Hamiltonian Tree, Lucky Numbers, Append for OR, Mana Points, Minimize the Maximum, Chef And Babla, Far from origin, Battery Health, Redistributing Chocolates, Overspeeding Fine, Negative Product, Lcm hates Gcd, Read Pages, Chefs Favourite Function, Equal Hamming Distance, Prefix Ones, Three Powers of Two, Saving Taxes, Profit Increment, Make Array Odd, Zero String, Expected Value, 400M Race, Not Divisible, Take Not Less, Alice Potter And Dumbledore Army, Bi_lindrome!, Netflix, Tekken, Tom and Jerry Chase, Codechef Airlines, Concat Palindrome, Three Numbers, Bitwise Equation, Valid Expression, Passing Marks, Candy Store, Good Turn, Solve More Problems!, One Stone or Two Stones, Add smallest prime factor, Distinct Opposite Sums, Better Deal, Ageing, Permutation Subsequence, c8kbf and Tree, Prefix Permutation, Just One More Episode, Single-use Attack, Mode!, Running Comparison, Equal Elements, Beautiful Strings, Good XOR, Maximum Capacity, Sunny Day, Find eX, Make A-B Same, Reach Home, Difference Matrix, MIN To MAX, Candy Division, Chef Eren, Construct String, Budget of Technex, Couple Game, Max count of 1, Chef and Donation, Elections in Chefland, Max Binary, Chef And Adjacent Sums, Melt Gold, Four Tickets, Buy Ten Packets, Efficient PAN Linking, Return the Change, Inversions of subsequences, Inside The Stadium, IPL Ticket Rush, Can Chef , GCD Queries, TripTastic, Minimum Operation, String Game , Cricket Match, Unstable Subarray, Chef and Battery , Largest Y, CodeChef Learn Problem Solving, Maximise Score, Chef and Good Array, Existence, Monopoly, Plus 2 or Minus 1, AB plus C, Positive or Negative Subarrays, Parliament, DDMM or MMDD, Minimum OR Spanning Tree, Masterchef finals, Online or Offline, Largest and Second Largest, Cheapest Office, Learning SQL, AP Free Sequences, Printing Binary Array, Favourite Numbers, Anti Palindrome, Rectangular Tiling, Dividing into Groups, A Peculiar Arrangement, Odd GCD Permutation, Chef Odd, Blobby Volley Scores, Bus Seat Numbering, Parking Charges, The Gift, Gymkhana Election IIIT-A, CodeChef Streak, Possible or Not, Search for 404, Distance Coloring, Dotify Playlist, Water Filling, Oneful Pairs, Break Free, NASA, Right There, 7 Rings, Problem, Alt-Tab, Boxes, Donation Drive, Donation Rewards, Transfusion Chain, EVacuate to Moon, Messi vs Ronaldo, Swap the numbers, Mex Array, Bells of Pilgrimage, AB Difference, Caesar Cipher, Airport Management, 2000, Segment Three, Maximize Ones, Two Piles, Card Swipe, Endless Appetizers, Puzzle Hunt, Exclusion-Inclusion, All New CodeChef, Maximum Deliciousness, I Can Use Both Hands!, GCD Discount, Ultimate Fencing, Lucky Seven, Slow Start, Stamps 100, Air Quality Index, Concussive Sequence, Ant, Warrior Chef, Work Smarter, Not Harder, Off By One, Bit Play, Sports Section, Chef and Stocks, Fan Poll, Chef Fantasy 11, Playing with OR, Guess the winner!, Unique xor, Sunday Brunch, October Marathon, Dice Number, Lexicographically Largest , Construct An Array, Maximise Sum, Santa and Chocolates, Double Rent, GCD and LCM, Bone Appetit, Dracula Eats, Dull Operation, Wishcraft, Survival Time, Minimum XOR, Clan Expansion, Rivalry, Rock Paper Scissor, Pending Assignments, Fair Distribution, Clear Day, OR Permutation, Cricket World Cup Qualifier, Best of N Sets, Worth of a Video, Water Park, Airlines, Prefixing, Exams, 404 Not Found, Food Costs, Fair Share Settlement, Minimise Maximum Subarray Sum, Maximum Score , Make N Zero, Thala For A Reason, Delete The Array, Subtraction Sequence I, Subtraction Sequence II, Painting Walls, Christmas Greetings, A PLUS B Remastered, Decorating Christmas Tree, Codechef Round, Chef Product, Hattrick, Minimum Wage, Exact Savings, Access Control, Spell Shortening, Subset GCD, International Education Day!, Xorry 2, Xorry 1, Advitiya, Cookie Day, K Odd Sum, Xorred, Count Subarrays, Count Arrays, Valentines Contest, Sub or Swp, Frequal, Colourful Balls, Caesar Cipher Lite, Leg Space, Room Allocation, Maximise Adjacent Sum, Matrix Modulo, Summer Time, Fake Certificate, AC Please, Freedom, The Ides of March, Football Training, Updating A, Swapping Marks Digits, K-Closeness, Gotta Catch Em All
Contests (0):
None
Learning Paths (0):
None
Practice Paths (62):
Strings:
DNA Storage, Wordle, Play Piano, Different Consecutive Characters , Malvika is peculiar about color of balloons, World Chess Championship, DDMM or MMDD, Efficient PAN Linking, Chef and Happy String , Studying Alphabet, Blobby Volley Scores, Lapindromes, Chef and Feedback, Chef and the Wildcard Matching
Arrays:
Compress the Video, Find maximum in an Array, Take discount or Not, Snapchat, The Squid Game, Cost of Groceries, MIN To MAX, Bomb the base, Running Comparison, Red Light, Green Light, Largest and Second Largest, Kitchen Timetable, CodeChef Streak, Candies, Workers, Count of Maximum, Cops and the Thief Devu
Basic Math:
Fitness, Test Averages, 7 Rings, Second Max of Three Numbers, Chef and Chocolates, Make AP, Find Remainder, Integers that sum to the same value, Candy Store, Minimum Number of Ones, Negative Product, Scalene Triangle, GCD and LCM, Sum of Digits, Favourite Numbers, Construct N, Alternate Additions, Farmer And His Plot, Two vs Ten, Puppy and Sum, Divisible by 3, Balls and Boxes
Contributions
Problems Authored (0)
No Contribution
Problems Tested (0)
No Contribution
Editorials Contributed (0)
No Contribution