from operator import mod


n = int(input())

s = input()

mod = 998244353
dp = [[0] * 3 for _ in range(n + 1)]


for i in range(n):
    if s[i] == '?':
        for j in range(3):
            for k in range(10):
                dp[i + 1][(j + k) % 3] += dp[i][j]
                dp[i + 1][(j + k) % 3] %= mod
        for k in range(10):
            dp[i + 1][k % 3] += 1
            dp[i + 1][k % 3] %= mod
    else:
        for j in range(3):
            dp[i + 1][(j + int(s[i])) % 3] += dp[i][j]
            dp[i + 1][(j + int(s[i])) % 3] %= mod
        dp[i + 1][int(s[i]) % 3] += 1
ans = 0

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