#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,m;
cin>>n;
if(n>=200&&n<=299){
	m=n+50;
}
else if(n>=300&&n<=499){
	m=n+100;
}
else if(n>=500){
	m=n+200;
}
else if(n<200){
	m=n;
}
cout<<m;



	return 0;
}

/**************************************************************
	Problem: 1391
	User: hbq
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:2072 kb
****************************************************************/