func_code_string: #include <bits/stdc++.h>   using namespace std;   map<string, int> mp;   int t, x;   string s;   char ch;   string transform(string x) {     string s =   ;     for (char ch : x)       if ((ch -  0 ) % 2)         s +=  1 ;       else         s +=  0 ;     while (s.size() < 20) s =  0  + s;     return s;   }   int main() {     ios::sync_with_stdio(false);     cin >> t;     for (int i = 0; i < t; i++) {       cin >> ch >> s;       s = transform(s);       if (ch ==  ? ) {         cout << mp[s] << endl;       } else {         if (ch ==  + ) mp[s]++;         if (ch ==  - ) mp[s]--;       }     }     return 0;   }   