题解 | #排列与二进制#
排列与二进制
https://www.nowcoder.com/practice/647fc23dc4e147328cc484e3aeb6cc2a
#include <iostream>
using namespace std;
int main() {
int n, m;
while (cin >> n >> m) {
if (!n && !m)
break;
int sum = 0;
for (int i = 0; i < m; ++i) {
int k = n - i;
while (!(k & 1)) {
k >>= 1;
sum++;
}
}
cout << sum << endl;
}
}
简洁的位运算
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