#include<bits/stdc++.h>
using namespace std;
int main(){
	int s,k;
	cin>>s;
	if(s>=500){
		k=s+200;
	}
	if(s>=200&&s<=299){
		k=s+50;
	}
	if(s>=300&&s<=499){
		k=s+100;
	}
	if(s<200){
		k=s;
	}
	cout<<k;
}
/**************************************************************
	Problem: 1391
	User: tonghuawei
	Language: C++
	Result: Accepted
	Time:23 ms
	Memory:2072 kb
****************************************************************/