All Problems

587 problems total

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TitleDifficultyVideosCompanies
Balance Parentheses with Minimum Insertions and Deletionshard-
Check if a graph is minimally-connectedmedium-
Conditional selection between x and y with bitwise operationsmedium-
Design a Sparse Arrayeasy-
Determining the Existence of a Valid Secret Code in Mastermind Based on Given Guesses and Scores Guesses and Scoresmedium-
Find if there is a path between two vertices in a directed grapheasy-
Find the Index of the First Occurrence in a Stringeasy-
Divide Two Integersmedium-
Fisher-Yates Shufflemedium-
Flatten a Multi-Level Linked List level by levelmedium-
Implement Elo Rating Systemmedium-
Two Sumeasy
Add Two Numbers represented as Linked List in Reversed Ordermedium-
Longest Substring Without Repeating Charactersmedium
Median of Two Sorted Arrayshard-
Longest Palindromic Substringmedium
Reverse Integermedium-
Convert String to Integer atoimedium-
Palindrome Numbereasy
Regular Expression Matchinghard-
Container With Most Watermedium
Integer To Romanmedium-
Roman To Integereasy
Longest Common Prefix in array of stringeasy-
3Sum0 - Find three elements in an array that sum to a zeromedium
3Sum - Closestmedium-
Letter Combinations of a Phone Numbermedium-
4Summedium-
Remove Nth Node From End of Listmedium
Valid Parentheseseasy
Merge Two Sorted Linked Listseasy
Generate Parenthesesmedium-
Largest String With Swapsmedium-
Merge K Sorted Listshard
Minimum and Maximum in an array with Optimal Comparisonsmedium-
Next Bigger Integer with Same Number of 1-Bitsmedium-
Number of Overlapping Lines between points on 2 parallel lineseasy-
Number of Ways to Rearrange Sticks With K Sticks Visiblehard-
Qux Color Transformationmedium-
Rearranging Array Elements by Index Mappingmedium-
Reservoir Sampling Explainedmedium-
Rotate an Array to Leftmedium-
Swap Nodes in Pairsmedium-
K Reverse a linked listhard-
Remove duplicates from Sorted Array 1easy
Substring with Concatenation of All Wordshard-
Next Permutationmedium-
Longest Valid Parentheseshard-
Search in Rotated Sorted Arraymedium
Find first and last positions of target element in sorted arraymedium-
Showing 1 to 50 of 587 results