#include<stdio.h>int main() {int n,i;scanf("%d",&n);int arr[n];for(i=0;i<n;i++){scanf("%d",&arr[i]);}int max=arr[0];for(i=0;i<n;i++){if(max<arr[i]){max=arr[i];}}int min=arr[0];for(i=0;i<n;i++){if(min>arr[i]){min=arr[i];}}int r;r=max-min;printf("%d",r);return 0;}
