func_code_string: #include <bits/stdc++.h>   using namespace std;   template <typename T>   void debug(T v, string delimiter =   n ) {     for (__typeof(v.begin()) it = v.begin(), it_end = v.end(); it != it_end; it++)       cout << *it << delimiter;     cout << flush;   }   int dx[] = {0, 1, 0, -1};   int dy[] = {1, 0, -1, 0};   string ds =  SENW ;   const double PI = 4.0 * atan(1.0);   string solve(string s) {     if (s[0] ==  0 ) return 0;     long long ans = 1;     if (s[0] ==  ?  || isalpha(s[0])) ans = 9;     string zero =   ;     vector<int> used(30);     int rem = 10;     if (isalpha(s[0])) {       used[s[0] -  A ] = 1;       rem--;     }     for (int i = 1; i < (int)(s.size()); i++) {       if (s[i] ==  ? ) {         zero +=  0 ;       } else if (isalpha(s[i])) {         if (used[s[i] -  A ] == 0) {           used[s[i] -  A ] = 1;           ans *= rem;           rem--;         }       }     }     ostringstream out;     out << ans;     string ret = out.str();     return ret + zero;   }   int main() {     string s;     while (cin >> s) {       cout << solve(s) << endl;     }     return 0;   }   