Compilare: main.cpp: In function 'int BF()': main.cpp:32:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (j = 0; j < G[nod].sz; j++) | ^ main.cpp: In function 'int main()': main.cpp:63:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for (i = 0; i < G[N].sz; i++) | ^