Compilare: user.cpp: In function ‘void BFS()’: user.cpp:31:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp:33:17: warning: unused variable ‘y’ [-Wunused-variable] int y = L[node][i].first; ^ user.cpp: In function ‘void DFS(const int&)’: user.cpp:61:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^ user.cpp:69:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[node].size(); i ++) ^