mod = 998244353

N = int(input())
S = input()
dp = [[0 for _ in range(3)] for _ in range(N + 1) ]
dp[0][0] = 1
for i in range(N):
    if S[i] == '?':
        for j in range(3):
            for k in range(10):
                dp[i + 1][(k + j) % 3] += dp[i][j]
                dp[i + 1][(k + j) % 3] %= mod
        if i != 0:
            for k in range(10):
                dp[i + 1][k % 3] += 1
                dp[i + 1][k % 3] %= mod
    else:
        s = int(S[i])
        for j in range(3):
            dp[i + 1][(j + s) % 3] += dp[i][j]
            dp[i + 1][(j + s) % 3] %= mod
        if i != 0:
            dp[i + 1][s % 3] += 1
            dp[i + 1][s % 3] %= mod

ans = 0
for i in range(1, N + 1):
    ans += dp[i][0]
    ans %= mod
print(ans)
exit()