#include <iostream>
using namespace std;
int main() {
    int arr[] = {3,7,2,9,10,6,1,8};
    int sum = 0, count = 0;
    for(int i=0; i<8; i++){
        if(arr[i] % 3 == 0){
            sum += arr[i];
            count++;
        }
    }
    cout << sum + count << endl;
    return 0;
}