#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 sum = 0, top = A[0];
  for (int i = 1; i < N; i++) {
    cout << i << endl;
    if (A[i] - top < 0) {
      sum += top - A[i];
    } else {
      top = A[i];
    }
  }
  cout << sum << endl;
}
