Compilare: main.cpp: In function 'int main()': main.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for(int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:54:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int j = i; j < s.size(); j++){ | ~~^~~~~~~~~~