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