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