#include<iostream> using namespace std; int a[10005],b,c,big = -100001,small =10009; int main(){ cin>>b; for(int i = 1;i<=b;i++){ cin>>a[i]; } for(int i = 1;i<=b;i++){ if(big<a[i]){ big = a[i]; } if(small>a[i]){ small = a[i]; } } c=big-small; cout<<c; return 0; }