import java.util.*;

class Main{

	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();

		int min = 1000000000;
		int max = 0;

		for(int i=0; i<N; i++){
			int A = sc.nextInt();
			min = Math.min(min,A);
			max = Math.max(max,A);
		}

		System.out.println(Math.abs(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