Compilare: main.cpp: In function 'int main()': main.cpp:25:47: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = max((int)a.size() - c, 0); i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:29:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i = 0; i < b.size(); ++i) { | ~~^~~~~~~~~~