#include <iostream>
#include <algorithm>
using namespace std;

int main()
{
  int n;
  while(1){
    int ans=1000000;
    cin>>n;
    if(n==0)break;
    for(int a=0; a<=50; a++){
      for(int b=0; b<=50; b++){
	for(int c=0; c<=50; c++){
	  int sum=(380*(5*(a/5)))*0.8+(a%5)*380;
	  sum+=(550*(4*(b/4)))*0.85+(b%4)*550;
	  sum+=(850*(3*(c/3)))*0.88+(c%3)*850;
	  if(a*200+b*300+c*500==n){
	    ans=min(ans, sum);
	  }
	}
      }
    }
    cout<<ans<<endl;
  }
  return 0;
}