#include <bits/stdc++.h>
int main() {
  int N;
  scanf("%d", &N);
  int i, a[100] = {};
  for (i = 0; i < N; i++) {
    scanf("%d", &a[i]);
    printf("%d\n", a[i]);
  }
  int Max = 0, Min = 1000;
  for (i = 0; i < N - 1; i++) {
    if (Max < a[i]) {
      Max = a[i];
    }
    if (a[i] < Min) {
      Min = a[i];
    }
  }
  printf("%d", Max - Min);
  return 0;
}
