【第一部分】09Leetcode刷题

一、位1的个数

题目：191. Number of 1 Bits

C++ Soution 1:

 class Solution {
 public:
     int hammingWeight(uint32_t n)
     {
         int res = ;
         for (int i = ; i < ; ++i)
         {
             res += (n & );
             n = n >> ;
         }
         return res;
     }
 };

二、第k个排列

题目：60. Permutation Sequence

C++ Soution 1: