#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic pop
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  string s;
  cin >> s;
  using A = array<mint, 3>;
  A dp;
  dp[0] = 1;
  mint ans;
  for(char c: s) {
    A ndp;
    if (c == '?') {
      rep(i, 3) rep(x, 10) {
        ndp[(i + x) % 3] += dp[i];
      }
    } else {
      int x = c - '0';
      rep(i, 3) ndp[(i + x) % 3] += dp[i];
    }
    ans += ndp[0];
    dp = ndp;
    dp[0]++;
  }
  cout << ans.val() << '\n';
}