#include<bits/<stdc++.h>
using namespace std;
int main(){
	int n,s;
	cin>>n;
	if(n>200&&n<299) s=n+50;
	else if(n>300&&n<=499) s=n+100;
	else if(n>500) s=n+200;
	else if(n<200) s=n;
	cout<<s;
    return 0; 
}
/**************************************************************
	Problem: 1391
	User: chenmingyu
	Language: C++
	Result: Compile Error
****************************************************************/