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题目 You are given an n x n 2D matrix representing an image. Rotate the image by 90 degrees (clockwise). 思路： 1、传统思路：将行和列互换，但是前期行换列的过程会影响到后期的行换列，所以要额外使用一 阅读全文
posted @ 2016-04-12 19:50
wangb021
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题目： Rotate an array of n elements to the right by k steps. For example, with n = 7 and k = 3, the array [1,2,3,4,5,6,7] is rotated to [5,6,7,1,2,3,4]. 阅读全文
posted @ 2016-04-12 19:19
wangb021
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Given an array and a value, remove all instances of that value in place and return the new length. Do not allocate extra space for another array, you 阅读全文
posted @ 2016-04-12 19:11
wangb021
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