#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ int n,i,h1=0,h2=10000; cin>>n; int a[n]; for(i=0;i<n;i++){ cin>>a[n]; if(a[n]>h1){ h1=a[n]; }if(a[n]<h2){ h2=a[n]; } } cout<<h1-h2; return 0; }