UVa 10499

#include <bits/stdc++.h>
#define ll long long

using namespace std;

int main()
{

 ll n,p;

 while(cin>>n)
 {
  if(n<0) break;
  p=(n*100)/4;
  if(n==1) cout<<0<<"%"<<endl;
  else cout<<p<<"%"<<endl;
 }

 return 0;
}