Compilare: main.cpp: In function 'int main()': main.cpp:57:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | while (i < d1.size() and j < d2.size()) | ~~^~~~~~~~~~~ main.cpp:57:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | while (i < d1.size() and j < d2.size()) | ~~^~~~~~~~~~~