# include<iostream>//a=96 using namespace std; int main(){ int n,max=0,min=10000; cin>>n; int a[n]; for(int i=0;i<n;i++){ cin>>a[i]; if(a[i]>max){ max=a[i]; } if(a[i]<min){ min=a[i]; } } cout<<max-min; return 0; }