#include <iostream>
using namespace std;
int main() {
    int arr[3][4] = {{1,2,3,4}, {5,6,7,8}, {9,10,11,12}};
    int sum = 0;
    for(int i = 0; i < 3; i++) {
        sum += *(*(arr + i) + 2);
    }
    cout << sum << endl;
    return 0;
}