Compilare: main.cpp: In member function 'void heap::descent(int)': main.cpp:22:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if (2 * pos + 1 >= v.size()) | ~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if ((2 * pos + 2 == v.size()) or v[2 * pos + 1] < v[2 * pos + 2]) | ~~~~~~~~~~~~^~~~~~~~~~~ main.cpp:21:9: warning: unused variable 'aux' [-Wunused-variable] 21 | int aux; | ^~~