Compilare: main.cpp: In function 'int main()': main.cpp:77:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for(int i = 0; i<s1.size(); i++) | ~^~~~~~~~~~ main.cpp:97:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for(int i = 0; i<s2.size(); i++) | ~^~~~~~~~~~