#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a;
	if(a>=200&&a<=299){
		b=a+50;
	} 
	if(a>=300&&a<=499){
		b=a+100;
	}
	if(a>=500){
		b=a+200;
	}
	cout<<b;
}
/**************************************************************
	Problem: 1391
	User: toughuatao1
	Language: C++
	Result: Wrong Answer
****************************************************************/