#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,s;
	cin>>n;
	if(n>=200&&n<=299) s=n+50;
	else if(n>=300&&n<=499) s=n+100;
	else if(n>=500) s=n+200;
	else if(n<200) s=n;
	cout<<s;
}
/**************************************************************
	Problem: 1391
	User: fandaohan
	Language: C++
	Result: Accepted
	Time:38 ms
	Memory:2072 kb
****************************************************************/