1.
#include <iostream>
using namespace std;
int main() {
int n, x, s = 0, k = 0;
cin >> n;
for (int i = 1; i <= n; ++i) {
cin >> x;
if (x % 2 == 1 && x % 3 == 0) {
s += x;
k++;
}
}
cout << (float)s / k;
}
4.
#include <iostream>
using namespace std;
int main() {
int x, p;
cin >> x;
if (x == 0) p = 0;
else p = 1;
while (x != 0) {
if (x % 10 % 2 == 1) {
p *= x;
}
cin >> x;
}
cout << p;
}
//Sper ca te-am ajutat =)
