import java.util.*;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int N=Integer.parseInt(sc.next());
int[] A=new int[N];
for(int i=0;i<N;i++){
A[i]=Integer.parseInt(sc.next());
}
Arrays.sort(A);
int max=A[N-1]-A[0];
System.out.println(max);

}
}
/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