Compilare: main.cpp: In function 'bool bellman(int)': main.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int y = 0 ; y < v[j].size() ; ++y){ | ~~^~~~~~~~~~~~~ main.cpp:17:19: warning: 'n_added_to_q' is used uninitialized [-Wuninitialized] 17 | n_added_to_q[x]++; | ~~~~~~~~~~~~~~^ main.cpp:14:30: note: 'n_added_to_q' declared here 14 | int starting_point = x , n_added_to_q[N + 1]; | ^~~~~~~~~~~~