#include<bits/stdc++.h>
using namespace std;

int main()
{ string s;cin>>s;
  if(s.size()==3)
    {cout<<s<<endl;}
  else if(s.size()==2)
  {
      cout<<"0"+s<<endl;
  }else if(s.size()==1){
      cout<<"00"+s<<endl;
  }
    return 0;
}