#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
	cin>>n;
	if(n<=100){
		cout<<n*2; 
	}else{
		cout<(n-100)+100*2;
	} 
    
}

/**************************************************************
	Problem: 1637
	User: yangjunwen
	Language: C++
	Result: Compile Error
****************************************************************/