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做太多遍了,秒杀。
class Solution { public: int hammingWeight(uint32_t n) { int num = 0; for(;n; n &=(n-1), num++); return num; } };
【leetcode】Number of 1 Bits (easy)
原文地址:http://www.cnblogs.com/dplearning/p/4344854.html