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Practice Problems (6):
Contests (22):
Starters 122 Division 4 (Rated):
Problem Reviews, Arya In Grid, Transformation Cost, Man of the Match, Healthy Sleep
Starters 123 Division 3 (Rated):
Room Allocation, Maximise Adjacent Sum, Check Adjacent Sum, Minimum And Maximum I, Minimum And Maximum II
Starters 124 Division 3 (Rated):
Table Strength, Cricket Tournament, Make It One, Swap and Unite, Binary Parity
Learning Paths (462):
Logic Building in C++:
Debug this code - Why is this code incorrect, Debug this code - Total prize money, Debug this code - Population, Practice problem - Absolute function, Debug this code - Credits, Debug this code - Max minus Min, Practice problem - Tax in Chefland, Debug this code - Advance, Debug this code - Pass the Exam, Debug this code - Car Trip
Logic Building in C:
Basic math - Addition and multiplication, Practice problem - Age Limit, Practice problem - Tax in Chefland
Beginner DSA in Python:
Flow control continued, Arrange right flow, Tracing key variable-1, Lets practice , Debugging problem using checkpoints, Try to solve this problem using checkpoints, Problems using checkpoints with key variable, Problems using checkpoints and key variable, Learning to create test cases, Learning to create test cases continue, Identify the valid edge testcase, Find the edge test case and debug, Find the edge test case and debug, Identify valid edge case, Find the edge test case and debug, Identify the valid edge case, Find the edge case and debug
Beginner DSA in C:
Flow control continued, Arrange right flow, Tracing key variable-1, Tracing key variable - 2, Tracing key variable - 3, Lets practice , Debugging problem using checkpoints, Try to solve this problem using checkpoints, Problems using checkpoints with key variable, Problems using checkpoints and key variable, Learning to create test cases, Learning to create test cases continue, Find the correct edge test case, Identify valid edge case, Find the edge case and debug, Identify the valid edge testcase, Find the edge test case and debug, Identify the valid edge test case, Find the edge test case and debug, Identify valid edge case, Find the edge test case and debug, Identify the valid edge case, Find the edge case and debug
Beginner DSA in C++:
Try to solve this problem using checkpoints, Problems using checkpoints with key variable, Find the correct edge test case, Find the correct edge test case, Find the edge case and debug
Beginner DSA in Java:
Flow control continued, Arrange right flow, Tracing key variable-1, Tracing key variable - 2, Tracing key variable - 3, Lets practice , Debugging problem using checkpoints, Try to solve this problem using checkpoints, Problems using checkpoints with key variable, Problems using checkpoints and key variable, Learning to create test cases, Learning to create test cases continue, Find the correct edge test case, Find the edge test case, Find the edge case and debug, Identify the valid edge testcase, Find the edge test case and debug, Identify the valid edge test case, Find the edge test case and debug, Find the edge test case and debug, Identify the valid edge case, Find the edge case and debug
Learn Java:
Introduction, Printing text, MCQ - 1, MCQ - 2, Multiple Outputs, Understanding the print command, Area & Perimeter of Rectangle, Rearrange Code, Inserting space between numbers, Division, Understanding the default code, MCQ, Rearrange, Declaring a variable, Addition of Variables, MCQ - 7, MCQ - 8, MCQ - 9, Reaarange - 3, Bool Datatype, Cost of painting, MCQ - 10, MCQ - 11, MCQ - 12, Arithmetic Operations, Assignment Operators, Multiple choice question, Multiple choice question, Relation Operators, Multiple choice question, Logical Operators, Multiple choice question, Conditional Operator, Multiple choice question, Multiple choice question, Multiple choice question, Solve this problem - 1, Solve this problem - 2, Operator precedence and Associativity, Operator precedence and associativity, Type conversion and type casting, Type conversion and type casting, Multiple choice question - 1, Coding problem - 3, Debugging Problem , Coding problem - 4, Creating a String, Concatenation , Strings and Integers, String length, Outputting Characters from a String, MCQ - 13, MCQ - 14, MCQ - 15, MCQ - 16, MCQ - 17, MCQ - 18, Changing Characters in a String, MCQ - 19, MCQ - 20, Taking user input, Scanner Methods, Calculator, Hello user, MCQ - 21, MCQ - 22, MCQ - 23, Find the Area of any rectangle, Mile to Kilometer Convertor, Table of Any Number, Rearrange Code, If & Else Statements, Curly braces, If Statement, Else If Statement, Else Statement, MCQ - 24, MCQ - 25, MCQ - 26, MCQ - 27, MCQ - 28, Conditions in if statements, MCQ - 29, MCQ - 30, And Statement, Or Statement, MCQ - 31, MCQ - 32, MCQ - 33, Problems on Conditional Statements, Switch, Break and Default statement, Reaarange - 3, MCQ - 34, Compilation error (syntax error), Compilation error continued, Mismatched Parenthesis, Runtime error, Logical Error or Wrong Answer (WA), Incorrect Conditionals, Incorrect Index, Debug the code - 7, Debug the code - 8, Debug the code - 9, Debug the code - 10, Debug the code - 11, Debug the code - 1, Debug the code - 3 , Debug the code - 6, While Loop, Print Numbers 5 - 20, Printing numbers 10 - 0, Odd numbers, User input Loop, Print powers of 2, Do While Loop, MCQ, MCQ, Coding problem - 1, Coding problem - 2, Coding problem - 3, Coding problem - 4, For Loop, Coding problem - 6, Coding problem - 7, Displaying the count of elements, Displaying the count of elements, Displaying the count of elements, Displaying the count of elements, Break Statement, Continue Statement, Looping through Arrays, For Each Loop, Displaying the count of elements, Displaying the count of elements, Nested loops, Nested loops continued, Nested loops best practices, Coding problem - 1, Coding problem - 2, Creating Arrays, Index & printing specific elements of an Array, Changing the elements of an Array, Displaying elements, Displaying the count of elements, MCQ - 35, MCQ - 36, MCQ - 37, Displaying the count of elements, Return values, Parameters and Arguments, MCQ - 1, Coding problem - 1, Coding problem - 2
Learn C++:
Introduction, Arithmetic Operations, Printing text, Multiple Choice Question, Multiple Choice Question, Multiple Outputs, Outputs In Separate Lines, Area & Perimeter of Rectangle, Multiple Choice Question, Rearrange Code, Multiple outputs using a single line, Inserting space between outputs, Inserting text Between Outputs, Multiple Choice Question, Multiple Choice Question, Multiplication , Division, Syntax , Multiple Choice Question, Rearrange Code
Learn C:
Printing a number, Arithmetic Operations, Multiple Choice Question, Multiple Choice Question, Multiple Outputs, Multiple Choice Question, Rearrange Code, Rearrange Code, Multiple Choice Question, Multiple Choice Question, Multiple Choice Question, Rearrange Code, Multiple Choice Question, Multiple Choice Question, Debugging Problem , Coding problem - 4, Rearrange Code, Multiple Choice Question, Multiple Choice Question, Problems on Conditional Statements, Logical Error or Wrong Answer (WA), Debug the code - 7, Debug the code - 8, Debug the code - 12, Coding problem - 1, Multiple Choice Question
Data structures using Java:
MCQ - 36, Queues - implementation, Insertion at end in Circular Linked List
Data Structures using C++:
MCQ - Tree Basic, MCQ - Trees Property, Implementation - Adjacency Matrix, Implementation - Adjacency List, MCQ - Depth and Height
Design and Analysis of Algorithms:
Merging two sorted arrays, Fake Coin Problem, Knapsack Problem, Longest Common Subsequence , MCQ - 2
Stacks and Queues:
Push and Pop, Queues - implementation, MCQ-1, MCQ1, Peek, isEmpty, isFull, isEmpty,isFull, functions of Queue, MCQ-2, Enqueue and Dequeue Functions, MCQ-3, Queue - Print Numbers with a Given Pattern, Queue - To do list, Stacks - Sample implementation, Library used for queues implementation, Stack implementation using arrays-2, Valid Parenthesis, Evaluate Expression, Next Greater Element, Next Greater Element, Next Smallest Element, Largest Rectangle in Histogram, Libraries for deque
Combinatorics:
MCQ - 1, MCQ - 2, Fruit Basket, MCQ - 1, The Inclusion-Exclusion Principle , MCQ - 3, Divisibility Problem, MCQ - 1, MCQ - 2, MCQ - 3, Calculating Ck, MCQ - 1, Word Couting, MCQ - 1, Permutation Subsequence, MCQ - 1, Distance Coloring, MCQ - 1, Robot Movings
Trees and Binary trees:
Height of the tree, Nodes at Kth Level, Tree Path Sum, Neighbours of node, Subtree Sum, Diameter of the tree, LCA of two nodes, Distance between two nodes, Kth ancestor of the node, Largest value at each level, Distinct colors in subtrees, Minimum time to collect all coins, Height Balanced Binary Tree, Identical Binary Trees, Mirror Tree, Maximum nodes in BT, Level Order Traversal, ZigZag Traversal, Boundary of the Binary Tree, Implementation - Binary Tree, Top view of the Binary Tree, PreOrder Traversal, Minimum Depth of Binary Tree, PostOrder Traversal, Construct Binary Tree, InOrder Traversal, Sum of deepest leaves, Height of Binary Tree, Find the Subtree, Time Complexity, Reconstruct the Tree, Triplet LCA, Trees - Branch Sum, Paths with given sum, Search in BST, Print nodes in sorted order, Find maximum node in BST
Logic Building in JavaScript:
Data Types, How to accept integer inputs, How to accept multiple inputs in a line, How to accept multiple integers on separate lines, How to accept string inputs, How to print output, Input mirror, What are test cases, What are test cases, Test cases with multiple lines of input, Test cases with multiple types of input, How to use custom inputs, Difference between Run and Submit, Number mirror - Negative integer, String mirror - Double strings, Debug this code - Why is this code incorrect, Debug this code - Why is this code incorrect, Basic math - Addition and multiplication, Practice problem - Tuition fees, Practice problem - Fitness, Debug this code - Total prize money, Subtraction and division of numbers, Division with integer and decimal output, Practice problem - Squats, Debug this code - Determine the Score, Debug this code - Population, Some useful math functions, abs() - Absolute function, Modulo function, Practice problem - Modulo function, Practice problem - Absolute function, Practice problem - Burgers, Practice problem - Capacity, Debug this code - Credits, Debug this code - Max minus Min, Module on basic conditional statements, Review syntax usage, Comparison operators, Practice problem - Age Limit, Practice problem - Tax in Chefland, Logical operators & conditional statements, Logical operators, Debug this code - Football Cup, Debug this code - Advance, Debug this code - Pass the Exam, Practice problem - Apples and Oranges, Practice problem - Interior Design, Practice problem - Alice and Marks, Debug this code - Chef gives Party, Debug this code - Car Trip, Problem (Make Avg) - Generate examples, Problem (Make Avg) - Solve sub-components, Problem (Make Avg) - Solve sub-components, Problem (Make Avg) - Solve the complete problem, Problem(Farm animals) - Generate examples, Problem(Farm animals) - Solve sub-components, Problem(Farm animals) - Solve the complete problem, Problem 3 (High Accuracy) - Generate examples, Problem 3 (High Accuracy) - Solve sub-components, Problem(High Accuracy)- Solve the complete problem, Problem (MOVIE2X) - Generate examples, Problem (MOVIE2X) - Solve the complete problem, Problem (Flip cards) - Generate examples, Problem (Flip cards) - Solve sub-components, Problem (Flip cards) - Solve the complete problem
ATT - C++:
Rearrange Code, Multiple Choice Question, Rearrange Code, Creating a String, Concatenation , Strings and Integers, String length, Printing Characters From a String, Changing Characters in a String, String Operations, Multiple Choice Question, Multiple Choice Question
Practice Paths (160):
Practice Python:
Chef and Brain Speed, Alice and Marks, Black cells in a chessboard, Add Two Numbers, Age Limit
Linked Lists:
Remove Duplicates from Sorted List, Crits in a Linked List! , Linked List - Cycle in a linked list, Count loop length in Linked List, Insert and Delete, Even and Odd, Rotate the List, Reverse The Linked List, Reverse the Segment, Next Smaller value, Strange List, Reverse m size groups
Two pointers:
Remove Duplicates, Difference Pairs, The Great Run, Maximum Common Elements, Coronavirus Spread, Special Substring, Find Array Min, Minimum Similar Substring
Stacks and Queues:
Valid Parenthesis, Transform the Expression, Necklace, Stone Pile, Evaluate Expression, Stack Sort, Previous smaller element, Sliding Window Maximum, Largest Rectangle in Histogram, Maximum water in a section, Maximum Area
Heaps:
Representation of a Heap, Insertion in a Heap, Deletion in a Heap, Insertion and deletion together in a Heap
Bit manipulation:
And, OR, XOR, Count of set bits, How to set, unset, flip a bit, Finding least significant, most significant bit, Least significant bit, and most significant bit, Decimal to binary, Bit Manipulation - Single Number
Practice for ZCO and INOI:
Lead Game, Longest Palindrome, End of Corruption, Discrepancies in the Voters List, Zero One Tiles, Next Permutation, Sorting Rows of Numbers, Whats the Rank, Dividing Sequences, Word List, Permutation Cycles, The Great Escape, Number of Tilings, Find the Numbers, Repetition Free Numbers, Indraneels Pyramid, The Siruseri Sports Stadium, Equal Gifts, Speculating on Buffaloes, Draw Fixing
Practice JavaScript:
Number Mirror, Chef and Instant Noodles, CodeChef Learn Problem Solving, Learning SQL, Add Two Numbers
Strings:
DNA Storage, N Buttons 1 Bulb, Wordle, Play Piano, Different Consecutive Characters , Check if a string is anagram of another, Convert String to Title Case, Malvika is peculiar about color of balloons, World Chess Championship, DDMM or MMDD, Add One, Check if a string is a substring of another, Chef and Happy String , Efficient PAN Linking, Blobby Volley Scores, Studying Alphabet, Lapindromes, Chef and Feedback, Convert string to number, Typing Letter, Chef and the Wildcard Matching, Password
Arrays:
Search an element in an array, Compress the Video, Find maximum in an Array, Find the peak elements in an array, Take discount or Not, Snapchat, Cost of Groceries, The Squid Game, MIN To MAX, Bomb the base, Running Comparison, Red Light, Green Light, Largest and Second Largest, Kitchen Timetable, Difficulty Rating Order, CodeChef Streak, Candies, Merge two sorted arrays, Workers, Count of Maximum, Cops and the Thief Devu
Basic Math:
Fitness, Test Averages, Second Max of Three Numbers, 7 Rings, Chef and Chocolates, Make AP, Find Remainder, Integers that sum to the same value, Candy Store, Minimum Number of Ones, Scalene Triangle, Negative Product, Sum of Digits, GCD and LCM, Favourite Numbers, Make A and B equal, Construct N, Alternate Additions, Farmer And His Plot, Two vs Ten, Puppy and Sum, Divisible by 3, Balls and Boxes
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