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Given two non-negative integers x and y, an integer is powerful if it is equal to x^i + y^j for some integers i >= 0 and j >= 0. Return a list of all 阅读全文
posted @ 2019-01-11 19:34
yuxihong
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Two images A and B are given, represented as binary, square matrices of the same size. (A binary matrix has only 0s and 1s as values.) We translate on 阅读全文
posted @ 2019-01-11 17:29
yuxihong
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Let's play the minesweeper game (Wikipedia, online game)! You are given a 2D char matrix representing the game board. 'M' represents an unrevealed min 阅读全文
posted @ 2019-01-11 15:22
yuxihong
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Given an array A, we can perform a pancake flip: We choose some positive integer k <= A.length, then reverse the order of the first k elements of A. W 阅读全文
posted @ 2019-01-11 14:38
yuxihong
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