#include <bits/stdc++.h> using namespace std; int main(){ int n,a,maxa=0,maxb=999999,difference; cin>>n; for(int i=0;i<n;i++){ cin>>a; if(a>maxa)maxa=a; if(a<maxb)maxb=a; } difference=maxa-maxb; cout<<difference; return 0; }