Compilare: main.cpp: In function 'void bfsd(int)': main.cpp:28:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for (x = 0; x < bkv[y].size(); x++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (x = 0; x < v[y].size(); x++) | ~~^~~~~~~~~~~~~