Two Sigma OA - YRB - 博客园



Two Sigma OA - YRB - 博客园

刚做了两道Two Sigma OA。

还是两道老题, Friend Cycle和Longest Chain。

Friend Cycle可以用Union Find来做。优化的时候因为矩阵是沿对角线对称,所以可以只扫描一半的元素,也可以加上Path Compresssion和 weight。

Longest Chain是参考reference里大神的解法。使用set保存,代码写得很简练,非常棒。

我自己想做的时候也是用一个set,保存所有函数。 然后用一个Map<String,Map<String,List<String>>>来存每个word。 最后还要遍历一遍map来找到最长的一个List。不过没有实现完全。

不管怎样先做了OA再说, 打算约面试晚一点,多准备准备OO Design和系统设计。

Reference:

http://yuancrackcode.com/


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