import sys


N = int(input())
S = input()
dat = [0] * 10
for s in S:
    dat[int(s)] += 1
ans = set()

t = 0

if N == 1:
    print(1)
    exit()
elif N == 2:
    ans.add(int(S))
    ans.add(int(S[1]) * 10 + int(S[0]))
    print(len(ans))
    exit()
    
for i in range(1,10):
    if dat[i]:
        dat[i] -= 1
    else:
        continue
    for j in range(1,10):
        if dat[j]:
            dat[j] -= 1
        else:
            continue
        for k in range(1,10):
            if dat[k]:
                dat[k] -= 1
            else:
                continue

            t = i + 10 * j + 100 * k
            for u in range(1,10):
                t += u * dat[u] * 40
            ans.add(t % 120)

            dat[k] += 1
        dat[j] += 1
    dat[i] += 1
print(len(ans))