#include <iostream>
using namespace std;

int decTobinary(int decNum){
    int ans=0,pow=1;

    while(decNum>0){
        int rem = decNum % 2;
        decNum/=2;

        ans+= (rem * pow);
        pow *=10;
    }

    return ans;//binary form
}

int main() {
    int decNum=50;
    cout << decTobinary(decNum) << endl;
    return 0;
}