#include<stdio.h>
void main()
{
	
	int m,z; 
	scanf("%d",&m);
	if(m>=200&&m<=299){
		z=m+50;
	}else if(m>=300&&m<=499){
		z=m+100;
	}else if(m>=500){
		z=m+200;
	}else if(m<200){
		z=m;
	}
	printf("%d",z);
	
 }
  
/**************************************************************
	Problem: 1391
	User: admin
	Language: C
	Result: Accepted
	Time:27 ms
	Memory:1144 kb
****************************************************************/