Untitled

#include<iostream>  
#include<algorithm> 

using namespace std; 

int main(){ 	
	int n, arr[100000]; 
	cin >> n; 
	for(int i = 0; i < n; i++){ 
		cin >> arr[i];
	} 
	sort(arr, arr+n); 
	cout << arr[n-1] - arr[0];
}