#include <bits/stdc++.h>
using namespace std;

int main(){
	int n,r;
	cin>>n;
	if(n < 200){
		r = n;
	}else if(n >= 200 && n <= 299){
		r = n + 50;
	}else if(n >= 300 && n <= 499){
		r = n + 100;
	}else if(n >= 500){
		r = n + 200;
	}
	cout<<r<<endl;
    return 0;
}

/**************************************************************
	Problem: 1391
	User: admin
	Language: C++
	Result: Accepted
	Time:30 ms
	Memory:2072 kb
****************************************************************/