30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    // Write your code here
    int count = 0;
    int i;
    if(n== -1)
    {
        return 32;
    }
    for(i=0;i<16;i++)
    {
        
        if(n & (1<<i))
        {
            count++;
        }
    }
    return count;
}

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