DSA/algorithms/CPlusPlus/Bit manupulation/number_of_ones.cpp

#include<bits/stdc++.h>
using namespace std;

int countones(int n){
    int count=0;
    while(n>0){
        n=(n&(n-1));          
        count++;
    }
    return count;
}

int main(){
    int n;
    cin>>n;
    cout<<countones(n);
}