#include <iostream>
using namespace std;

//23 / 2 = 11 ... 1
 11 / 2 =  5 ... 1
  5 / 2 =  2 ... 1
  2 / 2 =  1 ... 0
  1 / 2 =  0 ... 1

int main() {
   int n;
   int nums[100];
   while(cin>>n){
    int i=0;
    while(n!=0){
        nums[i]=n%2;
        i++;
        n/=2;
    }
    for(int j=i-1;j>=0;j--){
        cout<<nums[j];
    }cout<<endl;
   }
   return 0;
}
// 64 位输出请用 printf("%lld")