View Compilation Error

0_0_39294851_28795.cpp: In member function 'long long int trie::query(char*)':
0_0_39294851_28795.cpp:47:33: error: 'x' was not declared in this scope
   47 |                         int ch=(x>>i)&1ll;
      |                                 ^
0_0_39294851_28795.cpp: At global scope:
0_0_39294851_28795.cpp:2:23: error: '::main' must return 'int'
    2 | #define int long long int
      |                       ^~~
0_0_39294851_28795.cpp:56:1: note: in expansion of macro 'int'
   56 | int main()
      | ^~~