Compilare: main.cpp: In function 'int insert_element(std::pair<int, int>)': main.cpp:17:1: warning: no return statement in function returning non-void [-Wreturn-type] 17 | } | ^ main.cpp: In function 'int get_next_element()': main.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i = 0; i < q.size(); ++ i) { | ~~^~~~~~~~~~