Compilare: user.cpp: In function ‘int main()’: user.cpp:20:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < rez.size(); ++i) ^ user.cpp: In function ‘void BFS()’: user.cpp:59:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[nod].size(); ++i) ^ user.cpp:65:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[nod].size(); ++i) ^ user.cpp:76:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[nod].size(); ++i) ^ user.cpp:84:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < V[x].size(); ++j) ^