30. Count Set Bits in an Integer

#include <stdio.h>
#include <stdint.h>
int countSetBits(unsigned int n) {
    // Write your code here
    int count=0;
    uint32_t val= (uint32_t)n;
    while(val>0){
        if(val&1){
            count++;
        }
        val=val>>1;
    }
    return count;
}

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