``

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a[10001],b=-100,c=1000001;
    cin>>n;
    for(int i=1;i<=n;i++){
        cin>>a[i];
        if(a[i]>b){
            a[i]=b;
        }else if(a[i]<c){
            a[i]=c;
        }
    }
    cout<<b-c;
}