def main():
    N = int(input())
    S = input()

    array = [0] * 10
    for s in S:
        array[int(s)] += 1

    r_set = set()
    for i1 in range(1, 10):
        for i2 in range(1, 10):
            for i3 in range(1, 10):
                b_array = [0] * 10
                b_array[i1] += 1
                b_array[i2] += 1
                b_array[i3] += 1
                is_ok = True
                for j in range(10):
                    if b_array[j] > array[j]:
                        is_ok = False
                        break

                if is_ok:
                    b = i1 * 100 + i2 * 10 + i3
                    b %= 120

                    for j in range(1, 10):
                        c = array[j] - b_array[j]
                        d = (40 * j) % 120
                        d *= c
                        d %= 120
                        b += d
                        b %= 120
                    r_set.add(b)
    print(len(r_set))      




if __name__ == "__main__":
    main()