Compilare: main.cpp: In function 'std::pair<int, int> find_left_son(std::vector<std::pair<int, int> >, int)': main.cpp:8:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 8 | if (root_index * 2 > heap.size() - 1) return make_pair(-1, -1); | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'std::pair<int, int> find_right_son(std::vector<std::pair<int, int> >, int)': main.cpp:13:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | if (root_index * 2 + 1 > heap.size() - 1) return make_pair(-1, -1); | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~