combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:11:15: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
11 | while(s.size()<N){
| ~~~~~~~~^~
combo.cpp:13:17: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
13 | if(s.size()*4+7>N*4){t=s+q[0]+q[1];
| ~~~~~~~~~~~~^~~~
combo.cpp:16:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
16 | if(m==s.size()+2)s=s+q[0]+q[1];else
| ~^~~~~~~~~~~~
combo.cpp:17:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
17 | if(m==s.size()+1){ if(press(t)==s.size()+1)s+=q[0]; else s+=q[1];}else
| ~^~~~~~~~~~~~
combo.cpp:17:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
17 | if(m==s.size()+1){ if(press(t)==s.size()+1)s+=q[0]; else s+=q[1];}else
| ~~~~~~~~^~~~~~~~~~~~
combo.cpp:18:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | if(m==s.size()+0) s+=q[2];
| ~^~~~~~~~~~~~
combo.cpp:24:5: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | if(m==s.size()+0)s+=q[2];else
| ~^~~~~~~~~~~~
combo.cpp:25:5: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
25 | if(m==s.size()+1)s+=q[1];else
| ~^~~~~~~~~~~~
combo.cpp:26:5: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
26 | if(m==s.size()+2)s+=q[0];}
| ~^~~~~~~~~~~~