MOD = 998244353

n = int(input())
S = input()

dp = [0, 0, 0]
ans = 0
for s in S:
    if s == "?":
        lst = list(range(10))
    else:
        lst = [int(s)]
    for x in lst:
        ans += dp[-x % 3]
        if x % 3 == 0:
            ans += 1
        ans %= MOD
    ndp = [0] * 3
    for x in lst:
        ndp[x % 3] += 1
        for i in range(3):
            ndp[(i + x) % 3] += dp[i]
            ndp[(i + x) % 3] %= MOD
    dp = ndp
print(ans)