#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; int a[n]; int min=220,max=80; for(int i=0;i<n;i++){ cin>>a[i]; if(a[i]>max) max=a[i]; if(a[i]<min) min=a[i]; } cout<<max-min; return 0; }