combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:21:15: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
21 | while(s.size()<N){
| ~~~~~~~~^~
combo.cpp:23:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
23 | for(int k=0;k<a.size();k++){
| ~^~~~~~~~~
combo.cpp:62:1: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
62 | if(b=="Y")
| ^~
combo.cpp:64:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
64 | d++;
| ^