Compilare: main.cpp: In function 'int main()': main.cpp:15:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | while(pntB < b.size()){ | ~~~~~^~~~~~~~~~ main.cpp:24:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | while(i < nrb2.size() && pntB < b.size()){ | ~~^~~~~~~~~~~~~ main.cpp:24:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | while(i < nrb2.size() && pntB < b.size()){ | ~~~~~^~~~~~~~~~