password.cpp: In function 'std::string guess(int, int)':
password.cpp:20:19: error: 'query' was not declared in this scope
20 | raod[i] = query(k);
| ^~~~~
password.cpp:27:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
27 | for(int i0=0; i0<v.size(); i0+=2){
| ~~^~~~~~~~~
password.cpp:31:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
31 | while(l < v[i0].size() && r < v[i1].size()){
| ~~^~~~~~~~~~~~~~
password.cpp:31:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
31 | while(l < v[i0].size() && r < v[i1].size()){
| ~~^~~~~~~~~~~~~~
password.cpp:34:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
34 | for(int i=r; i<v[i1].size(); i++)ne += v[i1][i];
| ~^~~~~~~~~~~~~
password.cpp:35:24: error: 'query' was not declared in this scope
35 | ll t = query(ne);
| ^~~~~
password.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | if(t == l + 1 + v[i1].size()){
| ~~^~~~~~~~~~~~~~~~~~~~~~~
password.cpp:49:1: warning: no return statement in function returning non-void [-Wreturn-type]
49 | }
| ^