#include<bits/stdc++.h>
using namespace std;
int main()
{
    int a,j;
	cin>>a;
	int b=a%5;
	if(b==1)
	j=a-1;
	if(b==2)
	j=a-2;
	if(b==0)
	j=a-0;
	if(b==3)
	j=a+2;
	if(b==4)
	j=a+1;
	cout<<j;
    return 0;
}