Microsoft Interview Misc


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Onsite Round #1 美国热情大叔。第一题:找到关于左树、右数的一些东西。两分钟写好代码,大叔说卧槽这么快。。。第二题:给你excel表格每一列的坐标,再给你鼠标坐标,判断位于哪一列。这道题用Binary Search的一个小变种,但当时考虑的是用BST因为用户可以改变列宽,BST方便做出这样的调整。大叔说不用不用你想多了。。。第三题:Join two files, one with 64GB, one with 100TB, with 8 GB RAM。 这道题可以先把大文件sort一遍,用来减少disk seek time。应用bucket sort/radix sort/three-way quick sort,可以达到O(N)。

Onsite Round #2 美国小哥。只做了一道题:Given a array with integers, find the maximum product of two numbers. 这道题可以分情况讨论,从而达到O(N) with constant space。

Onsite Round #3 美国小哥。第一题maximum sum subarray。第二题: Given a file structure and pointer to a file, print the file path. 用一个stack存parent指针,再输出来就好。可以做的优化是提前算出需要多少字符,用reserve提前预留这样的字符,再用memset,这样可以避免string appending出现new allocate的情况。



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