#include<iostream> #include<cstring> #include<cmath> using namespace std; int main(){ int a,c=0; cin>>a; int b[111]; if(a==0) cout<<0; while(a!=0){ b[c]=a%2; a/=2; c++; } for(int i=c-1;i>=0;i--){ cout<<b[i]; } return 0; }