Yubo Liu
- 4★liuyubobobo
- China
- Professional
- Freelancer
- List of teams by Yubo Liu
- https://discuss.codechef.com/u/liuyubobobo
- No Active Plan. View Details
Activity Heat Map
NewRating Graph
Ratings System Update
(2022-11-02 23:00:02)Ratings System Update
(2022-12-20 00:00:00)CodeChef Rating Distribution
Submissions
Practice Problems (499):
Practice:
Different Neighbours, Counting Pretty Numbers, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, A Pizza Slice, Manhattan Rectangle, Guess It Right, Max Range Queries, Chef and Secret Password, Buying New Tablet, Chef and Party, Roll the Bar, Average Number, The Tricky Deal, No Change Required, The Theatre Problem, School of Geometry, Hard Cash, Remove Balance, GCD of Prefixes, Chef on Vacation, New Piece, Disgust Minimization, Back to Campus, Make them equal, Chef and Contest, Sleepy Chef, Indivisible Permutation, Distinct Elements, Finding Pairs, Stable Sequence, Weird Values, Genes, Brutal-Xors, Chef and Pal, String protocol, Plusle and Minun on Array, Equal Integers, Subarray permutations, Devendra and Water Sports, Akash and Grid, ChefWM, And Or Union, Covid and Theatre Tickets, Mean equals Median, The Melancholy of Problem Setter, Retrieve back the Array, Chef and Riffles, Help Chef, Power Sum, Prefix Zeros, Palindromes Not Allowed, Sum and OR, Mean Maximization, Subsegment Divisibility , Non Zero Xor, An Interesting Sequence, Mask Policy, Merged LIS, Hungry Ashish, Even Subset Xor, Equal Card Game, Merging Binary Strings, Equal LIS, Average of Three, Chef and Profits, Subarray Mex, Maximise the Minimum, Maximising Vacations, Non Zero Subarray Xor, Anti Palindrome, Palindrome Love, Avoid Contact, Chef and Subset Additions, Chef and Lockout Draws, Permutation XOR Sum, Building Towers, Special String, Minimum Longest Substring, Badminton Serves, Divisors and Reciprocals, Yet Another Constructive Problem, EVM Hacking, Equal MEX, Fixed Weight, Remove Adjacent, Hidden Permutation, Count Arrays, Valentine Vex, Perfect Permutation, K Distinct Array, Points and Lines, Fit in Data Type, Chef and His Fruit Stand, String Reverse, Stone Game, Array Division, Careless Chef, Car or Bike, Valentine is Coming, Count the Notebooks, Hostel Room, Control the Pollution, Distinct Binary Strings, Non Coprime Neighbours, Get Lowest Free, Too many items, Shopping Change, Complete the credits, Guess the bottom face, Lazy Salesman, Peaceful Party, Prefix Permutation, 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, Increase 2 consecutive characters, Watching Movies at 2x, Travelling in the Graph, Chessboard Distance, Decomposition Reaction, Permutation Xority, Max Heat, Bomb the base, Max BIT Sum, Self Defence Training, Interactive Tree, Magnet Sort, Car Choice, Qualify the round, Count the Holidays, Secret Tree, Janmansh and Games, Janmansh and Coins, Janmansh and Assignments, Janmansh at Fruit Market, Dragonado And XOR, Interactive Tree 2, Equal Mex Splitting, Alternating Divisibility, Alice and Marks, Integers that sum to the same value, Squeeze OR, Minimum Coloring, Maximizing LIS, Gift Shop and Coupon, Chef and Water Bottles, Swapping Chefs Way, Prefix Suffix Operations, Credit score, Chef and Chocolates, Unbalanced Reversals, Balanced Reversals, Sad Splits, Winter, Minimum number of coins, Buy 2 Get 1 Free, Chef and Brain Speed, Chef and Gym, Chef and Masks, CRED Coins, Adjacency Love, Separate Them All, XOR and AND, Alternating String, Sign Moves, Cup Finals, The Unchanging OR, Group Assignment, Economics Class, Stable Mex, Maximize the Minimum, Binary String Cost, LR Shirts, Volume Control, Finding Shoes, Training Plans, Two Merchants, Flip Sorting, Chef Goes Shopping, Test Averages, Bucket and Water Flow , Apples and Oranges, Chef and Chocolates, Course Registration, Sticks and Rectangles, Funny Hand, Array operations, Email Reminders, Distinct Dilemma, Broken Life, The Cheaper Cab, Monthly Budget, Jump to Sibling, Minimum Cars required, Non Adjacent Flips, Dark Light, Make Them Equal, Chef Find XOR Beautiful, Binary Mismatch, Average Array, Binary String Xor, Count The Arrays, Is the Score Consistent, Good Quality Bulbs, Positive Products, Lulymp, Expiring Bread, Good Permutation, Lunchtime, Mario and Transformation, Buckets Full of Candies, Mario and Bullet, Pair Pain, Concurrent Lines, Palindrome Pain, Admins and Shopping, Water Requirement, Police and Thief, Dazzling Even-Odd Challenge, Jenga Night, Candy Distribution, Chef and Happy String , Equalizing Numbers, Compress the Video, Buying Sweets, Reduce to 1, Crazy Substrings, Who is taller!, Presents for Cheffina, All Roads Lead To Rome, Easy Permutation, Array Equality, Chef and Chapters, Chef and Bird farm, Minimize Blocked Roads, Farmers League, Game of Pooks, Doubled Distances, Roller Coaster, Beat the Average, Laptop Recommendation , Infernos, Maximum OR Minimum, Too Mean, Yet Another Palindromic Problem, Four Arrays, Closest Vowels, A Bit Easy, Chef gives Party, Get Subscription, Good Pairs, Average Gift, Maximum XOR, Anti-knapsack, Dominant Army, Circular Track, Difficulty Rating Order, Maximum Pairwise Modular Sum, Balanced 0-1 Tree, 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, Not Tree Again!, Max Value of MST, Even Equal Odd, Chess Ratings, Infinity Staircase, Sort the Array, 7th Love, Doubt Support Availability, Or Permutation, Good Pairs, Whatsapp Messages, Take discount or Not, Black and White, Remove and Add, Is this priority or parity!, Path Parity, Determine the Winner, Avoid The Landmines, Rating Improvement, Playlist, Break the Stick, First and Last, Construct An Array , Sorting Array, Maximise Score, Cringe Queries, How Many Maximums, Age Limit, Minimum number of Flips, Zero Ones Equal One Zeros, Make them Equal, The Optimal Pairs, Burgers, DNA Storage, Joining Date, The Lost Array, Waiting Time, It is My Serve, Too many Floors, Determine the Score, Max Shift After XOR, XOR Times 2 Is Sum, Equal by XORing, Dense Bracket Sequence, Biryani classes, Air Hockey, The Attack of Knight, Jogging, Xor and Multiply, KBG and GN-Theory, Prime Xor, Vowel Anxiety, Chef and his Apps, Best of Two, Retrieve the Array, Adjacent Sum Parity, Change Row and Column Both, Enough Space, Permutation And Median, K-MEX, Students-Far From Hostel, High Accuracy, Array sorting, Journey of the Knight, Sort the String, Counting Words, MATH1 Enrolment, Army Training, Game of Piles Version 1, Slow Solution, 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, Make Palindrome 2, Interior Design, The Last Levels, Easy Pronunciation, Yet Another Palindrome Making Problem, Maximum Median Matching, True and False Paper, Positive array, N Buttons 1 Bulb, Sum of Product 2, Split The String, High Frequency, Good Indices, Is it hot or cold, Maximise the Tastiness, Monks, Valid Minimum, Air Blimp, Permutation GCD, Beautiful Array, Sum Product Segments, Discount, Mileage matters, Add Subtract Equalize, Nearest Court, Average Permutation, Chef & Cook Game, Adjacent Xors, Split N, Copy and Paste, Final Population, Different Medians, TV Discount, Dominant Element, Angled Flip, Tree of Trees, XOR with smallest element, Tree Coloring, AI Analysing Code, Minimum Sum, WA Test Cases, Air Conditioner Temperature, K-Flip, Gritty Grid, Flipping Failure, Nil Xor, Subtract 12 Operation, Black&White Ring Game, Height of Rationals, Car Trip, Greater Average, Odd Pairs, Make A and B equal, Weights, Equal Distinct, Subarray Game, Number of Credits, Ticket Fine, Departments (Hard Version), K Flip, Team of Two, Departments (Easy Version), Ball Sequence, Balls and Boxes, Permutation Clear, Distinct Numbers, Fever, Mean and Median, Broken Phone, OR Tuples, Delicious Queries, Maximum Expression, Even Splits, Non-Negative Product, Two Different Palindromes, Piles Parity, Break the elements, Equivalent Numbers, Ranklist Pages, Reach the Target, Add to Subsequence, Remove Bad elements, K - Beautiful Permutation, Collinear Points, Maximum Subarray , Seven-Segment Factoring, Suspense String, Confusing Concatenations, Audible Range, Expert Setter, Speciality, Alternative Sufferings, Maximum Sum, Red Green Grids, Yet Another Palindrome Problem, Tax in Chefland, Tri XOR, Paper Cutting, Palindrome Flipping, Card Removal, Equal Inversions, Palindrome Partition, Different Consecutive Characters , Weird Subarrays, Red Blue Flowers, Row Bombing, Subarray Removal, Reach on Time, Odd Sum Pair, Get the Segment, Strange BST, Joint XOR, Disjoint XOR, Sorted Substrings, Make Multiple, Final Sum, Pythagorean Pair, X Jumps, Max minus Min, Test Score, Distinct Neighbours , Count Partitions , GCD Sort, Packing Books, Minimum Absolute Score, Tasty Decisions, Avoid Squares Please, Mario and the Broken String, Luigi and Uniformity, Distinct Neighbours , Distinct Colors, Water Consumption, Good Binary Strings, Palindrome by Splitting, Just Like Mob!, Binary Battles, Squats, Monopoly in Chefland, Good XOR, Distinct Matrix, Divide Pages, Maximum Capacity, Sunny Day
Contests (152):
February Challenge 2019 Division 2:
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2:
Chef got Recipes, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit
February Challenge 2021 Division 2:
Frog Sort, Team Name, Prime Game, Multiple Games, Maximise Function
January Long 2022 - I, Division 2 (Unrated):
Keplers Law, Prime in a binary string, Covid Spread, Chef and Riffles
February Long 2022 - I, Division 2 (Unrated):
Digit Multiplication By K, Binary Base Basics, Bitwise Blend, N Queens Puzzle Solved !, Chef and the Hair Salon
February Long 2022 - II, Division 2 (Unrated):
Avoid Fixed Points, World Chess Championship, Sequence GCD, Bitwise swaps, Chef and NextGen, Xor Palindrome
March Long One 2022, Division 2 (Unrated):
Akash and Function, Subarray XOR, Substring of a Substring, Akash and Missing Class, Count the Ones, Exact Marks, MEX on Trees, Discus Throw, Bath in Winters, Wordle
March Long Two 2022, Division 2 (Unrated):
Chef and Races, Increase IQ, The Three Topics, Missing Numbers, The Rating Dilemma, Same Parity Swaps in Binary Strings, Kostomuksha and AESC MSU
April Long One 2022, Division 2 (Unrated):
Dazzling GCD Pair, Prime Sum, Dazzling AXNODR Challenge , Bullets and Enemies, Ezio and Guards, The Cooler Dilemma 1, The Cooler Dilemma 2, Pairwise Xors
April Long Two 2022 Division 2 (Unrated):
Geometric Mean Inequality, Sasta Shark Tank, Akash and Equal Mean, Six Friends, Best Coupon, Pseudo Sorted Array
May Long One 2022 Division 2 (Unrated):
Mystical Numbers, Pushpa , The Magical Stone, Alternating Diameter, Sugarcane Juice Business, The Attack of Queen, Football Cup, Miami GP
May Long Two 2022 Division 2 (Unrated):
Practice makes us perfect, Subsequence-Numbers Divisible by 7, Xor Palindrome, Subarrays with length, Score High, Total Prize Money, Make them Zero, Degree of Polynomial
June Long One 2022 Division 2 (Unrated):
Full Path Eraser, Expected move, Reduce to zero, Chairs Requirement, Subscriptions, Divisible by i , Possible GCD, Alternate Additions, Equal Strings
June Long Two 2022 Division 2 (Unrated):
Gcd and Lcm , Count the ACs, Make all equal using Pairs, AP Grid, The Subarray XOR, Complementary Strand in a DNA, Reversal Sorting, Fitness, Strong Elements
July Long Two 2022 Division 2 (Unrated):
Maximize Difference, Concat Sort, Chef in his Office, To Divide or Not To Divide, Sum of Product 1, Insurance, Hungry Chef
August Long 2022 Division 2 (Unrated):
Sale Season, Hello Equation, Two Trains, Maximum Submissions, Make A and B equal
September Long 2022 Division 2 (Unrated):
Speed Limit Test, Bob at the Bank, Chef and Wire Frames, Distinct Numbers, Pokemon Battles, Interesting Subarray, Good Pairs
October Long 2022 Division 2 (Unrated):
Chef And Array Construction, Podium Finish, Minimum Pizzas, Binary Substituition, Building Race, Single Operation Part 1, Single Operation Part 2
Starters 63 Division 2 (Rated):
Maximize 1s, Count Partitions , One-XOR Deletions, Make Length 1, Minimum Absolute Score, Greedy Grid Moves
November Long 2022 Division 2 (Unrated):
MaxEdges, Split and Maximize, Spliting Balls, Time Complexity, Water Mixing, String Game
Learning Paths (0):
None
Practice Paths (19):
Contributions
Problems Authored (0)
No Contribution
Problems Tested (0)
No Contribution
Editorials Contributed (0)
No Contribution