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