#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: chenjunlin
	Language: C++
	Result: Wrong Answer
****************************************************************/