#include <iostream>
#include <climits>
#include <cassert>

void f(int** arr, int arg, long long& answer, int index, int* size_arr, int* ind) {
    if (index == arg) {
        for (int i = 0; i < arg; ++i) {
            for (int j = i + 1; j < arg; ++j) {
                if (ind[i] == ind[j]) return;
            }
        }
        long long res = 1;
        for (int i = 0; i < arg; ++i) {
            res *= arr[i][ind[i]];
        }
        answer += res;
        return;
    }

    for (int i = 0; i < size_arr[index]; ++i) {
        ind[index] = i;
        f(arr, arg, answer, index + 1, size_arr, ind);
    }
}

int main(int arg, char** argv) {
    --arg;
    int* size_arr = new int[arg];
    for (int i = 1; i <= arg; i++) {
        int temp_size = 0;
        int j = 0;
        while (argv[i][j] != '\0') {
            temp_size *= 10;
            temp_size += argv[i][j] - '0';
            ++j;
        }
        size_arr[i - 1] = temp_size;
    }
    int** arr = new int*[arg];

    for (int i = 0; i < arg; i++) {
        arr[i] = new int[size_arr[i]];
        for (int j = 0; j < size_arr[i]; j++) {
          std::cin >> arr[i][j];
        }
    }

    long long answer = 0;
    int* ind = new int[arg];
    f(arr, arg, answer, 0, size_arr, ind);

    std::cout << answer;

    delete[] size_arr;
    for (int i = 0; i < arg; ++i) {
        delete[] arr[i];
    }
    delete[] arr;
    delete[] ind;
    return 0;
}