#include<bits/stdc++.h>
using namespace std;
int n;
int main(){
	cin>>n;
	if(n<200){
		cout<<n;
	}
	else if(n>=200&&n<299){
		cout<<n+50;
	}
	else if(n>=300&&n<499){
		cout<<n+100;
	}
	else if(n>=500){
		cout<<n+200; 
	}
	return 0;
}

/**************************************************************
	Problem: 1391
	User: chenzelin
	Language: C++
	Result: Wrong Answer
****************************************************************/