DSA Problems
12 problems · master the patterns that show up in every interview.
Daily set · 3 curated problems
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problems solved
Easy
0/55
Medium
0/104
Hard
0/10
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day streak
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Arrays
0/14
Strings
0/12
Two Pointers
0/11
Sliding Window
0/11
Binary Search
0/11
Stacks & Queues
0/11
Linked Lists
0/12
Trees
0/13
Tries
0/6
Heaps & Priority Queues
0/10
Backtracking
0/9
Graphs
0/13
Greedy
0/10
Dynamic Programming
0/16
Bit Manipulation
0/10
Topic
Problem
Difficulty
Strings
Valid Anagram
Strings
Easy
Easy
Strings
Valid Palindrome
Strings
Easy
Easy
Strings
Longest Substring Without Repeating Characters
Strings
Medium
Medium
Strings
Valid Parentheses
Strings
Easy
Easy
Strings
Longest Palindromic Substring
Strings
Medium
Medium
Strings
Longest Common Prefix
Strings
Easy
Easy
Strings
Group Anagrams
Strings
Medium
Medium
Strings
Roman to Integer
Strings
Easy
Easy
Strings
String to Integer (atoi)
Strings
Medium
Medium
Strings
Find the Index of the First Occurrence in a String
Strings
Easy
Easy
Strings
Isomorphic Strings
Strings
Easy
Easy
Strings
Zigzag Conversion
Strings
Medium
Medium