aaaa

#include <bits/stdc++.h>
using namespace std;
int a[100010];
struct Node{
    int x;
    int y;
};
int dir[2][2]{
    {1,0},
    {0,1}
};
int main(){
    int n;
    cin >> n;
    for (int i=1;i<=n;i++){
        cin >> a[i];
    }
    sort (a+1,a+n+1);
    cout << a[n]-a[1] << endl;
    return 0;
}
//难题？