A list of poupular but hard leetcode problems for interview

Here is the list most popular but hard interview questions that according to leetcode.

List of problems and solutions

1. find median of two sorted arrays
2. Regular expression matching
3. Merge K sorted lists
4. Find first missing positive
5. Trapping rain water
6. Wildcard matching
7. Minimum window substring
8. Largest rectangle in histogram
9. Binary Tree Maximum Path Sum
10. Word ladder
11. word break II
12. Max points on a line

link in github

github link

More interview questions can be found here:
Algorithm