#include<bits/stdc++.h>
using namespace std;
int main(){
	int s,q;
	cin>>s;
	if(s<=100){
		q=s*2;
	}
	if(s>100){
		q=s*2+(s-100)*1;
	}
	cout<<q;
	return 0;
}

/**************************************************************
	Problem: 1637
	User: huangcanwu
	Language: C++
	Result: Wrong Answer
****************************************************************/