Compilare: main.cpp: In function 'void ek()': main.cpp:62:19: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 62 | if(rez.size() != 2 * m){ | ~~~~~~~~~~~^~~~~~~~ main.cpp:66:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int i = 0; i < rez.size(); ++i) { | ~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:79:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for(k = 0; k < line.size(); ++k){ | ~~^~~~~~~~~~~~~