import java.util.Scanner;
class Main{
public static void main(String[]args){
Scanner scan=new Scanner(System.in);
  int a=scan.nextInt();
  int min=1145141919;
  int max=0;
  for(int i=0;i<a;i++){
  int b=scan.nextInt();
    if(b>max){
    max=b;
    }
    if(b<min){min=b;}
  }
  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