#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	if(n<200) cout<<n;
	if(n>=200&&n<300) cout<<n+50;
	if(n>=300&&n<500) cout<<n+100;
	if(n>=500) cout<<n+200; 
	return 0;
}
/**************************************************************
	Problem: 1391
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:34 ms
	Memory:2072 kb
****************************************************************/