password.cpp: In function 'std::string Merge(std::string, std::string)':
password.cpp:11:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | while (posa<a.size() && posb<b.size())
| ~~~~^~~~~~~~~
password.cpp:11:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | while (posa<a.size() && posb<b.size())
| ~~~~^~~~~~~~~
password.cpp:15:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
15 | for (int j=posb;j<b.size();j++)
| ~^~~~~~~~~
password.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for (int i=posa;i<a.size();i++)
| ~^~~~~~~~~
password.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
30 | for (int i=posb;i<b.size();i++)
| ~^~~~~~~~~
password.cpp: In function 'std::string guess(int, int)':
password.cpp:59:23: 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]
59 | for (int i=2;i<cur.size();i++)
| ~^~~~~~~~~~~