include<bits/stdc++.h>

using namespace std;

int main() {

int n;
cin>>n;
int a[n],max=INT_MIN,min=INT_MAX;
for(int i=0;i<n;i++)
{
	cin>>a[i];
	if(a[i]>max) max=a[i];
	if(a[i]<min) min=a[i];
}
cout<<max-min<<'\n';
return 0;

}