#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
	cin>>n;
	if(n>=200&&n<=299) cout<<n+50;
    else if(n>=300&&n<=499) cout<<n+100;
    else if(n>=500) cout<<n+200;
    else cout<<n; 
    return 0;
}
/**************************************************************
	Problem: 1391
	User: HUANGYIBO
	Language: C++
	Result: Accepted
	Time:41 ms
	Memory:2072 kb
****************************************************************/