Borderou de evaluare (job #614216)

Compilare: main.cpp: In function 'int main()': main.cpp:38:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 38 | while(pos_a <= a_.size() - 1 || pos_b >= 0) | ~~~~~~^~~~~~~~~~~~~~~~ main.cpp:40:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 40 | if ( pos_a <= a_.size() - 1 ) { | ~~~~~~^~~~~~~~~~~~~~~~