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DSA Problems

Practice with a collection of coding problems organized by difficulty, company, and algorithm type to prepare for technical interviews.

3374
Total Problems
840
Easy
1762
Medium
772
Hard

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ArrayBacktrackingBashBiconnected ComponentBinary Indexed TreeBinary Search
1. Two Sum
EasyAccenture +29Array +154.3073%
SolveVideo
LeetCode
2. Add Two Numbers
MediumAdobe +14Linked List +244.6802%
SolveVideo
LeetCode
3. Longest Substring Without Repeating Characters
MediumAdobe +20Hash Table +235.8029%
SolveVideo
LeetCode
4. Median of Two Sorted Arrays
HardAccolite +38Array +242.0813%
SolveVideo
LeetCode
5. Longest Palindromic Substring
MediumAccenture +50Dynamic Programming +234.8149%
SolveVideo
LeetCode
6. Zigzag Conversion
MediumAdobe +2String49.9012%
SolveVideo
LeetCode
7. Reverse Integer
MediumAdobe +10Math29.457%
SolveVideo
LeetCode
8. String to Integer (atoi)
MediumAdobe +8String18.2599%
SolveVideo
LeetCode
9. Palindrome Number
EasyAccenture +8Math58.0035%
SolveVideo
LeetCode
10. Regular Expression Matching
HardAdobe +8Dynamic Programming +228.6294%
SolveVideo
LeetCode
11. Container With Most Water
MediumAdobe +8Array +256.5758%
SolveVideo
LeetCode
12. Integer to Roman
MediumAdobe +8Hash Table +266.9068%
SolveVideo
LeetCode
13. Roman to Integer
EasyAccenture +18Hash Table +263.318%
SolveVideo
LeetCode
14. Longest Common Prefix
EasyAdobe +9String +144.254%
SolveVideo
LeetCode
15. 3Sum
MediumAdobe +21Array +235.8029%
SolveVideo
LeetCode
16. 3Sum Closest
MediumAdobe +6Array +246.2988%
SolveVideo
LeetCode
17. Letter Combinations of a Phone Number
MediumAirtel +34Backtracking +262.3296%
SolveVideo
LeetCode
18. 4Sum
MediumAdobe +8Array +237.0717%
SolveVideo
LeetCode
19. Remove Nth Node From End of List
MediumAmazon +7Linked List +147.3152%
SolveVideo
LeetCode
20. Valid Parentheses
EasyAdobe +25Stack +141.3907%
SolveVideo
LeetCode
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