cmy203的博客

Given several boxes with different colors represented by different positive numbers.You may experience several rounds to remove boxes until there is no box left. Each time you can choose some contin...

Given a string that contains only digits0-9and a target value, return all possibilities to addbinaryoperators (not unary)+,-, or*between the digits so they evaluate to the target value.Exampl...

On a 2-dimensionalgrid, there are 4 types of squares:1represents the starting square. There is exactly one starting square. 2represents the ending square. There is exactly one ending square. ...

Given an arrayAof non-negative integers, the array issquarefulif for every pair of adjacent elements, their sum is a perfect square.Return the number of permutations of A that are squareful. Tw...