from itertools import permutations
N = int(input())
s = input()

if N <= 5:
    ans = set()
    for p in permutations(s):
        ans.add(int(''.join(p)) % 120)
    print(len(ans))
    exit()
cnt = [0] * 10
for c in s:
    cnt[int(c)] += 1

ok = [False] * 40
for n in range(1000):
    cnt_n = [0] * 10
    tmp = n
    for _ in range(min(N, 3)):
        cnt_n[tmp % 10] += 1
        tmp //= 10

    ok_n = True
    for i in range(10):
        if cnt_n[i] > cnt[i]:
            ok_n = False
            break
    if ok_n:
        ok[n % 40] = True

print(sum(ok))