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












	return 0;
}
/**************************************************************
	Problem: 1391
	User: zhangchenhao
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:2072 kb
****************************************************************/