leetcode

0 class Solution {

1 public:

2 int sumIndicesWithKSetBits(vector<int> &nums, int k) {

3 int res = 0;

4

5 for (unsigned i = 0; i < size(nums); i++) {

6 if (popcount(i) != k) continue;

7 res += nums[i];

8 }

9

10 return res;

11 }

12 };