#include <bits/stdc++.h>
#include <atcoder/all>
#include <string>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
int main(void){
    int n;
    cin >> n;
    string s;
    cin >> s;
    vector<vector<mint>> dp(n + 1, vector<mint>(3));
    rep(i, n){
        if(s[i] == '?'){
            rep(j, 3){
                rep(k, 10) dp[i + 1][(j + k) % 3] += dp[i][j];
            }
            rep(k, 10) dp[i + 1][k % 3] += 1;
        }
        else{
            rep(j, 3) dp[i + 1][(j + int(s[i]-'0')) % 3] += dp[i][j];
            dp[i + 1][int(s[i]-'0') % 3] += 1;
        }
    }
    mint ans = 0;
    rep(i, n) ans += dp[i + 1][0];
    cout << ans.val() << endl;

}