#include <bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin >> n;
int t;
cin >> t;
int maxtem = t;
int mintem = t;
for (int i = 0; i<n-1;i++)
{
cin >> t ;
maxtem = max(maxtem,t);
mintem = min(mintem,t);
}
cout << maxtem - mintem << endl;
return 0;
}
using namespace std;
int main()
{
int n;
cin >> n;
int t;
cin >> t;
int maxtem = t;
int mintem = t;
for (int i = 0; i<n-1;i++)
{
cin >> t ;
maxtem = max(maxtem,t);
mintem = min(mintem,t);
}
cout << maxtem - mintem << endl;
return 0;
}

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