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

/**************************************************************
	Problem: 1391
	User: zhengzihao3
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/