func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     int arr[n];     for (int i = 0; i < n; i++) {       cin >> arr[i];     }     sort(arr, arr + n);     cout << (arr[n - 1] - arr[0] + 1) - n <<   n ;   }   