#include <iostream>
using namespace std;
int main() {
int n;
cin >> n;
int divizor = 2;
int este_prim = 1;
while (divizor < n) {
if (divizor % 10 == 0) {
este_prim = 0;
}
++divizor;
}
if (n == 0) {
este_prim = 0;
}
if (este_prim = 0) {
cout << "nu este prim";
}
else if (este_prim = 1) {
cout << "este prim";
}
return 0;
}
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