#include <iostream>
using namespace std;
int i;
int somma=0;
int conta=0;
int x;
int main() {
for(i=1;i<=10;i++)
{ cin>>x;
if ((x%2==0)&&(x%3==0)) {somma= somma+x; conta++;}
}
if(conta!=0) { cout<<"Media valori pari multipli di 3="<<(float)somma/conta<<endl;}
else {cout<<"Media numeri pari multipli di 3 non calcolabile!!"<<endl;}
// your code goes here
return 0;
}
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