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Question: you have an img data as an array, output the data for upsampling. For  example,  [1, 2, 3, 4, 5, 6] as width 3(2 rows) ==> ...

  316.   Remove Duplicate Letters Medium 1888 140 Add to List Share Given a string  s , remove duplicate letters so that every letter appear...

Note: state 1->3 if this cell will die in next step           state 0->2 if this cell will live in next step Ref [1]  https://lee...

283. Move Zeroes Easy 4561 144 Add to List Share Given an array  nums , write a function to move all  0 's to the end of it while mai...

============= 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.....

Ref [1]  http://www.geeksforgeeks.org/union-and-intersection-of-two-sorted-arrays-2/ Question

Question: Give a set of coins denoted by an integer array a . a[i] is the value of the i -th coin which can be any integer. Find the mi...

Ref [1]  https://leetcode.com/problems/shortest-word-distance-iii/ OJ

  243.   Shortest Word Distance Easy 531 41 Add to List Share Given a list of words and two words  word1  and  word2 , return the shortest d...

238 .  Product of Array Except Self Given an array  nums  of  n  integers where  n  > 1,  return an array  output  such that  output[i]...

  229.   Majority Element II Medium 2201 201 Add to List Share Given an integer array of size  n , find all elements that appear more than  ...

  216.   Combination Sum III Medium 1494 61 Add to List Share Find all valid combinations of  k  numbers that sum up to  n  such that the fo...