#include <bits/stdc++.h>
using namespace std;
const long long MOD = 998244353;
int main(){
  string S;
  cin >> S;
  string T = "010.";
  int N = S.size();
  vector<vector<long long>> dp(4, vector<long long>(N + 1, 0));
  dp[0][0] = 1;
  for (int i = 0; i < N; i++){
    for (int j = 0; j <= 3; j++){
      if (S[i] == '0' || S[i] == '?'){
        dp[j][i + 1] += dp[j][i];
        if (T[j] == '0'){
          dp[j + 1][i + 1] += dp[j][i];
        }
      }
      if (S[i] == '1' || S[i] == '?'){
        dp[j][i + 1] += dp[j][i];
        if (T[j] == '1'){
          dp[j + 1][i + 1] += dp[j][i];
        }
      }
    }
  }
  cout << dp[3][N] << endl;
}