n=int(input())
s=[0]+list(input())
for i in range(1,n+1):
    if s[i]=="?":s[i]=-1
    else:s[i]=int(s[i])
dp=[[0,0,0] for i in range(n+3)]

mod=998244353

for i in range(1,n+1):
    for j in range(3):
        if s[i]>=0:
            dp[i][j]+=dp[i-1][(j-s[i])%3]
            dp[i][j]%=mod
            if j==s[i]%3:dp[i][j]+=1
        else:
            for x in range(10):
                dp[i][j]+=dp[i-1][(j-x)%3]
                dp[i][j]%=mod
                if j==x%3:dp[i][j]+=1
ans=0
for i in range(1,n+1):
    ans+=dp[i][0]
    ans%=mod
print(ans)