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98 problems in this topic

# Title Topics Acceptance Pts Difficulty
1 Group Anagrams — 30 Medium Solve
2 Regular Expression Matching — 40 Hard Solve
3 Two Sum II - Input Array Is Sorted — 30 Medium Solve
4 Permutation in String — 30 Medium Solve
5 Daily Temperatures — 30 Medium Solve
6 Regular Expression Matching — 40 Hard Solve
7 Search in Rotated Sorted Array — 30 Medium Solve
8 Copy List with Random Pointer — 30 Medium Solve
9 Invert Binary Tree — 20 Easy Solve
10 Binary Tree Level Order Traversal — 30 Medium Solve
11 Serialize and Deserialize Binary Tree — 40 Hard Solve
12 Kth Largest Element in an Array — 30 Medium Solve
13 Subsets II — 30 Medium Solve
14 Clone Graph — 30 Medium Solve
15 Regular Expression Matching — 40 Hard Solve
16 Course Schedule II — 30 Medium Solve
17 Regular Expression Matching — 40 Hard Solve
18 Network Delay Time — 30 Medium Solve
19 Regular Expression Matching — 40 Hard Solve
20 Regular Expression Matching — 40 Hard Solve
21 House Robber II — 30 Medium Solve
22 Longest Increasing Subsequence — 30 Medium Solve
23 Regular Expression Matching — 40 Hard Solve
24 Interleaving String — 30 Medium Solve
25 Jump Game — 30 Medium Solve
26 Insert Interval — 30 Medium Solve
27 Regular Expression Matching — 40 Hard Solve
28 Spiral Matrix — 30 Medium Solve
29 Regular Expression Matching — 40 Hard Solve
30 Single Number — 20 Easy Solve
31 Contains Duplicate — 20 Easy Solve
32 Regular Expression Matching — 40 Hard Solve
33 Encode and Decode Strings — 30 Medium Solve
34 Best Time to Buy and Sell Stock — 20 Easy Solve
35 Min Stack — 30 Medium Solve
36 Regular Expression Matching — 40 Hard Solve
37 Regular Expression Matching — 40 Hard Solve
38 Search a 2D Matrix — 30 Medium Solve
39 Merge Two Sorted Lists — 20 Easy Solve
40 LRU Cache — 30 Medium Solve
41 Regular Expression Matching — 40 Hard Solve
42 Same Tree — 20 Easy Solve
43 Kth Smallest Element in a BST — 30 Medium Solve
44 Regular Expression Matching — 40 Hard Solve
45 Regular Expression Matching — 40 Hard Solve
46 Regular Expression Matching — 40 Hard Solve
47 Regular Expression Matching — 40 Hard Solve
48 Read environment variable with default — 20 Easy Solve
49 Sum 1..5 #1 — 40 Hard Solve
50 Filter evens #2 — 30 Medium Solve
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