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DSA Problem Sheets
Data Structures & Algorithms
📋 70 Problems● Easy 33● Medium 32● Hard 5
☕ Java🐍 Python⚙️ C++🟡 JavaScript
Showing 13 of 70 problems · Hash Table
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Title
Difficulty
23
Valid Anagram
Easy
29
Longest Subarray With At Most Two Distinct Values
Medium
31
Check If a String Contains a Permutation of Another
Medium
36
Longest Subarray With Sum Equal to K
Medium
37
Count Subarrays Summing to K
Medium
63
Find the First Non-Repeating Character in a String
Easy
63
Find the First Non-Repeating Character in a String
Easy
64
Group Strings That Are Anagrams of Each Other
Medium
64
Group Strings That Are Anagrams of Each Other
Medium
65
Check if Two Strings Are Isomorphic
Easy
65
Check if Two Strings Are Isomorphic
Easy
66
Sort Characters of a String by Frequency
Medium
66
Sort Characters of a String by Frequency
Medium