FJP 2022-12-30 16:59:27 8 返回题目
#include <bits/stdc++.h> using namespace std;
int n, sum;
signed main() { cin >> n; for(int i = 0; n > 0; ++i) { sum += (n % 2 == 1); n /= 2; } cout << sum; return 0; }