Compilare: main.cpp: In function 'void bfs()': main.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for (i = 0; i < v[nod].size(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp:24:12: warning: unused variable 'j' [-Wunused-variable] 24 | int i, j, nod; | ^ main.cpp: In function 'int main()': main.cpp:94:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 94 | for (i = 0; i < v[nod].size(); i++) { | ~~^~~~~~~~~~~~~~~