#include <iostream>
#include <math.h>
using namespace std;

int factorial(int a){
    int fact = 1;
    for(int i=1; i<=a; i++){
        fact *= i;
    }
    return fact;
}
int main(){
    int arr[5],count=0,j=0,k,pos_arr[5];

    for(int i = 0; i < 5; i++){
        cin >> arr[i];

        if(arr[i] > 0){
            pos_arr[j] = arr[i];
            j++;
        }

        if(arr[i]%2==0){
            count++;
        }
    }

    cout << "Count of even numbers is: " << count << endl;

    int base = pos_arr[0];

    for(k=0; k< j - 1; k++){
        for(int i=k+1; i<j; i++){
            if(factorial(base*pos_arr[i]) > pow(10,30)){
                cout << "Factorial of " << base*pos_arr[i] << " is valid" << endl;
            }
        }
        base *= pos_arr[k+1];
    }



}