#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	cin>>a;
	if(a>=200 && a<=299)
		cout<<a+50;
	if(a>=300 && a<=499)
		cout<<a+100;
	if(a>=500)
		cout<<a+200;		
	 
		
	return 0;
}
/**************************************************************
	Problem: 1391
	User: cyp
	Language: C++
	Result: Wrong Answer
****************************************************************/