Compilare: main.cpp: In function 'int main()': main.cpp:22:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i = 0;i < s2.size();i++) | ~~^~~~~~~~~~~ main.cpp:30:25: 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 = 0;i < s1.size();i++) | ~~^~~~~~~~~~~