leetcode

0 static auto _ = []() {

1 ios_base::sync_with_stdio(false);

2 cout.tie(NULL);

3 cin.tie(NULL);

4 return NULL;

5 }();

6

7 class Solution {

8 public:

9 int minOperations(const vector<int> &nums, int k) const {

10 for (const int n : nums)

11 k ^= n;

12 return __builtin_popcount(k);

13 }

14 };