func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t;     cin >> t;     multiset<long long int> s;     map<string, int> mp;     while (t--) {       char ch;       long long int x;       cin >> ch >> x;       string str(18,  0 );       string temp = to_string(x);       int j = 17;       for (int i = ((int)(temp).size()) - 1; i >= 0; i--) {         if ((temp[i] -  0 ) % 2 != 0) {           str[j] =  1 ;         }         j--;       }       if (ch ==  + ) {         mp[str]++;       } else if (ch ==  - ) {         mp[str]--;       } else {         cout << mp[str] <<   n ;       }     }   }   