30. Count Set Bits in an Integer

#include <stdio.h>

int countSetBits(unsigned int n) {
    int count=0;
    while(n)
    {
        
        n=n&(n-1);
       count++;

    }
    return count;

}

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