30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    int count=0;
    for(int i=0;i<=31; i++)
    {
        if((n >> i) & 1)
        {
            count++;
        }
    }
    return count;
}

int main() {
    int n;
    scanf("%d", &n);
    printf("%d", countSetBits(n));
    return 0;
}