#include<iostream> #include<cstring> #include<cmath> using namespace std; int main(){ int a[64]; int n; int t=0; cin>>n; if(n==0){ cout<<0; } else{ while(n!=0){ a[t]=n%2; n/=2; t++; } for(int i=t-1;i>=0;i--){ cout<<a[i]; } } return 0; }