#include <bits/stdc++.h>   using namespace std;   int main() {     long long int n, count = 0, count1 = 0, ans = 0, i, ma;     cin >> n;     long long int a[n];     for (i = 0; i < n; i++) {       cin >> a[i];     }     ma = a[0];     for (i = 0; i < n; i++) {       if (a[i] > ma) {         ma = a[i];       }     }     for (i = 0; i < n; i++) {       count = ma - a[i];       ans = ans + count;     }     cout << ans <<   n ;   }   