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

/**************************************************************
	Problem: 1391
	User: mc002
	Language: C++
	Result: Accepted
	Time:19 ms
	Memory:2072 kb
****************************************************************/