#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main() {
int n;
cin >> n;
vector<int> ted(n);
for(int i =0; i < ted.size(); i++){
cin >> ted[i];
}
sort(ted.begin(), ted.end());
int roznica =0;
roznica = (ted[ted.size()-1] - ted[0]) ;
cout << roznica;
return 0;
}
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