#include <iostream>
using namespace std;
int main() {
int p;
cin >> p;
if (p >= 4.50)
cout << "odlican";
else if (p >= 3.50)
cout << "vrlodobar";
else if (p >= 2.50)
cout << "dobar";
else if (p >= 1.50)
cout << "dovoljan";
else
cout << "nedovoljan";
return 0;
}
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