import java.util.*;

class Main {
  	static final int INF = Integer.MAX_VALUE;
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
      	int n = Integer.parseInt(sc.next());
      	int max = -1;
      	int min = INF;

      	for (int i = 0; i < n; i++) {
          	int a = Integer.parseInt(sc.next());
          	max = Math.max(max, a);
          	min = Math.min(min, a);
        }
      	System.out.println(max - min);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz