import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int num = sc.nextInt();
       	int ary[] = new int[num];
      
      	for(int i = 0; i < num; i++)
        {
        	ary[i] = sc.nextInt();
        
        }
      	
      	Arrays.sort(ary);
     	int ans = ary[num-1] - ary[0];
      	System.out.println(ans);
      
    }
}
/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