P2.05 P28754 Reversed number in binary

#include <iostream>
using namespace std;

int main () {
    int n;
    cin >> n;
    if (n==0) cout << "0";
    else {

        while (n>0) {
            if (n>1) {
                cout << (n%2);
                n/=2;
            }
            else {
                cout << "1";
                n=0;
            }