#include<iostream> using namespace std; int main(){ int m,i,a[10001],b,c,d; cin>>m; for(i=1;i<=m;i++){ cin>>a[i]; if(i==1){ b=c=a[i]; } if(a[i]>b){ b=a[i]; } if(a[i]<c){ c=a[i]; } } d=b-c; cout<<d<<endl; }