Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:23:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size() && ok == 1; i++ ){ ^ user.cpp: In function ‘int main()’: user.cpp:91:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < sol.size(); i++ ){ ^