#include<bits/stdc++.h> using namespace std; int main(){ int m; cin>>m; int max=0,min=99999999999999999; int a[m]; for(int i=0;i<m;i++){ cin>>a[i]; if(a[i]<min){ min=a[i]; } if(a[i]>max){ max=a[i]; } } cout<<max-min; return 0; }