Compilare: main.cpp: In function 'int main()': main.cpp:18:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 18 | while(s1.size() < n){ | ~~~~~~~~~~^~~ main.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i = 1; i < s1.size(); i++){ | ~~^~~~~~~~~~~ main.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i = 1; i < s2.size(); i++){ | ~~^~~~~~~~~~~