Codeforces 579A. Raising Bacteria(位运算)

You are a lover of bacteria. You want to raise some bacteria in a box.

Initially, the box is empty. Each morning, you can put any number of bacteria into the box. And each night, every bacterium in the box will split into two bacteria. You hope to see exactly xbacteria in the box at some moment.

What is the minimum number of bacteria you need to put into the box across those days?

Input

The only line containing one integer x (1 ≤ x ≤ 109).

Output

The only line containing one integer: the answer.

Examples

input

5

output

2

input

8

output

1

solution：

找一下n的二进制中1的个数

#include<cstdio>using namespace std;int main(){int n,ans=0;scanf("%d", &n);while (n){if (n & 1)ans++;n >>= 1;}printf("%d\n", ans);return 0;}