func_code_string: #include <bits/stdc++.h>   using namespace std;   const int MAX = 3e5;   int a[MAX] = {};   int main() {     int t;     cin >> t;     while (t--) {       char c;       long long s;       cin >> c >> s;       long long a1 = 0;       for (int i = 0; i < 18; i++) {         a1 = a1 * 2 + s % 2;         s /= 10;       }       if (c ==  + ) {         a[a1]++;       } else if (c ==  - ) {         a[a1]--;       } else {         cout << a[a1] <<   n ;       }     }     return 0;   }   