LIKE CODING

282. Expression Add Operators Hard 1414 237 Add to List Share Given a string that contains only digits  0-9  and a target value, return all...

Ref [1]  https://leetcode.com/problems/zigzag-iterator/ [2]  http://www.fgdsb.com/2015/01/30/zigzag-iterator/

278. First Bad Version Easy 1492 684 Add to List Share You are a product manager and currently leading a team to develop a new product. Unfo...

============= Line 8-13 computes c, which is the only possible celebrity Proof: if c=0, c does not know any one in [1...n-1]. [c+1.....

Note dp[i]: number of ways to paint i+1 fences dp[i] = dp[i-1]*k - dup dup denotes the number of ways to paint i fences while the...

Ref [1]  https://leetcode.com/submissions/detail/38811322/ OJ

  274.   H-Index Medium 809 1357 Add to List Share Given an array of citations (each citation is a non-negative integer) of a researcher, wr...