Compilare: main.cpp: In function 'int main()': main.cpp:52:34: 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 x = 0; x < s[j].first.size(); x++){ | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | if(st >= s[i].first.size()){ | ~~~^~~~~~~~~~~~~~~~~~~~