有在刷leetcode的么？刷了一天，结论是-‘题不难，智商是硬伤’

Bessy

从接收率高的开始刷。一道题 （https://oj.leetcode.com/problems/single-number-ii/）接受率在最容易的15%区间，今天用了4，5个小时。只是基本明白了答案。如果变一点内容，应该还是答不上来。
Given an array of integers, every element appears three times except for one. Find that single one.
Note:
Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?

各位也刷的这么困难么？

klux

都是挺基础的算法题，看个几十题就熟了
即使不为面试，练练基本功也是挺好的，加油