#include <iostream>

using namespace std;

int main() 
{
    int n;
    cin >> n;
    int arr[n]={0,};
    int max;
    int min;
    for(int i = 0;i < n;i++){
        cin >> arr[i];
    } 
    max = arr[0];
    for(int i = 1;i < n;i++){        
        if(max < arr[i]){
            max = arr[i];
        }
    }
    min = arr[0];
    for(int i = 1;i < n;i++){
        if(min > arr[i]){
            min = arr[i];
        }
    }
    cout << max-min;
    return 0;
}

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