#include<iostream> using namespace std; int a[1001]; int main(){ int n; int y=0,b=100000; cin>>n; for(int i=1;i<=n;i++){ cin>>a[i]; if(a[i]>y){ y=a[i]; } if(a[i]<b){ b=a[i]; } } cout<<y-b; return 0; }