Your progress
Saved in this browser only. No account, nothing sent anywhere.
Problems solved0 / 75
Patterns started0 / 15
Lessons finished0 / 15 live
By difficulty
Easy0/19
Medium0/49
Hard0/7
No progress yet
Solve a problem or open a lesson and it’ll show up here.
Start with Arrays & Hashing →By pattern
| Pattern | Lesson | Problems | Next up |
|---|---|---|---|
| 01Arrays & Hashing | Not started | 0 / 8 | Contains Duplicate |
| 02Two Pointers | Not started | 0 / 3 | Valid Palindrome |
| 03Sliding Window | Not started | 0 / 4 | Best Time to Buy and Sell Stock |
| 04Stack | Not started | 0 / 1 | Valid Parentheses |
| 05Binary Search | Not started | 0 / 2 | Find Minimum in Rotated Sorted Array |
| 06Linked List | Not started | 0 / 6 | Reverse Linked List |
| 07Trees | Not started | 0 / 11 | Invert Binary Tree |
| 08Tries | Not started | 0 / 3 | Implement Trie (Prefix Tree) |
| 09Heaps | Not started | 0 / 1 | Find Median from Data Stream |
| 10Backtracking | Not started | 0 / 2 | Combination Sum |
| 11Graphs | Not started | 0 / 6 | Number of Islands |
| 121-D DP | Not started | 0 / 10 | Climbing Stairs |
| 132-D DP | Not started | 0 / 2 | Unique Paths |
| 14Greedy | Not started | 0 / 2 | Maximum Subarray |
| 15Intervals | Not started | 0 / 5 | Insert Interval |