#include<iostream> #include<cmath> #include<cstdio> using namespace std; int main() { int m,n,max=0,min=1000; int i,j; cin>>n; for(i=1;i<=n;i++) { cin>>m; if(max<m) max=m; if(min>m) min=m; } j=max-min; cout<<j<<endl; return 0; }