Arrays
25 problems — 9 easy, 13 medium, 3 hard.
| # | Title | Difficulty | Frequency |
|---|---|---|---|
| 1 | Two Sum | easy | foundational |
| 11 | Container With Most Water | medium | frequently asked |
| 15 | 3Sum | medium | frequently asked |
| 26 | Remove Duplicates from Sorted Array | easy | foundational |
| 31 | Next Permutation | medium | frequently asked |
| 41 | First Missing Positive | hard | frequently asked |
| 48 | Rotate Image | medium | frequently asked |
| 53 | Maximum Subarray | medium | frequently asked |
| 54 | Spiral Matrix | medium | frequently asked |
| 73 | Set Matrix Zeroes | medium | frequently asked |
| 75 | Sort Colors | medium | frequently asked |
| 88 | Merge Sorted Array | easy | frequently asked |
| 121 | Best Time to Buy and Sell Stock | easy | foundational |
| 135 | Candy | hard | frequently asked |
| 164 | Maximum Gap | hard | common |
| 189 | Rotate Array | medium | frequently asked |
| 217 | Contains Duplicate | easy | foundational |
| 238 | Product of Array Except Self | medium | frequently asked |
| 283 | Move Zeroes | easy | foundational |
| 713 | Subarray Product Less Than K | medium | common |
| 974 | Subarray Sums Divisible by K | medium | common |
| 977 | Squares of a Sorted Array | easy | common |
| 1004 | Max Consecutive Ones III | medium | common |
| 1480 | Running Sum of 1d Array | easy | foundational |
| 1672 | Richest Customer Wealth | easy | warm up |