DSA sheet · Topic
Arrays & Hashing interview problems
Where every interview starts: scanning arrays, counting with hash maps and sets, and prefix sums.
- 15 problems
- Java + Python
- Free, no sign-up
01 Arrays & Hashing Where every interview starts: scanning arrays, counting with hash maps and sets, and prefix sums. 0 / 15
- 1 Two Sum Easy Has notes Practice Two Sum on LeetCode (opens in a new tab)
- 2 Contains Duplicate Easy Has notes Practice Contains Duplicate on LeetCode (opens in a new tab)
- 3 Valid Anagram Easy Has notes Practice Valid Anagram on LeetCode (opens in a new tab)
- 4 Best Time to Buy and Sell Stock Easy Has notes Practice Best Time to Buy and Sell Stock on LeetCode (opens in a new tab)
- 5 Majority Element Easy Has notes Practice Majority Element on LeetCode (opens in a new tab)
- 6 Move Zeroes Easy Has notes Practice Move Zeroes on LeetCode (opens in a new tab)
- 7 Merge Sorted Array Easy Has notes Practice Merge Sorted Array on LeetCode (opens in a new tab)
- 8 Group Anagrams Medium Has notes Practice Group Anagrams on LeetCode (opens in a new tab)
- 9 Top K Frequent Elements Medium Has notes Practice Top K Frequent Elements on LeetCode (opens in a new tab)
- 10 Product of Array Except Self Medium Has notes Practice Product of Array Except Self on LeetCode (opens in a new tab)
- 11 Longest Consecutive Sequence Medium Has notes Practice Longest Consecutive Sequence on LeetCode (opens in a new tab)
- 12 Maximum Subarray Medium Has notes Practice Maximum Subarray on LeetCode (opens in a new tab)
- 13 Subarray Sum Equals K Medium Has notes Practice Subarray Sum Equals K on LeetCode (opens in a new tab)
- 14 Sort Colors Medium Has notes Practice Sort Colors on LeetCode (opens in a new tab)
- 15 Next Permutation Medium Has notes Practice Next Permutation on LeetCode (opens in a new tab)
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