#include<bits/stdc++.h>
using namespace std;
int a[10000000];
int main()
{
	long long n;
	cin>>n;
    long long b=-10000,s=10000;
	for(int i=1;i<=n;i++)
	{
		cin>>a[i];
        if(b<a[i]) b=a[i];
        if(s>a[i]) s=a[i];
	}
    if(b>s)
	cout<<b-s;
    else cout<<s-b;
	return 0;
}

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