Compilare: main.cpp: In function 'void BFS(int)': main.cpp:24:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int j = 0; j < A[S[i]].size(); j++){ | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:15: warning: unused variable 'cnt' [-Wunused-variable] 39 | int a, b, cnt=0; | ^~~