Compilare: user.cpp: In function ‘void Unite(int, int)’: user.cpp:42:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[x].size(); i++) ^ user.cpp:48:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < V[y].size(); i++) ^ user.cpp: In function ‘int Father(int)’: user.cpp:59:9: warning: unused variable ‘f’ [-Wunused-variable] int f; ^ user.cpp: In function ‘void Solve()’: user.cpp:72:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[node].size(); j++) ^ user.cpp:79:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < V[neighb].size(); k++) ^ user.cpp:82:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l = 0; l < V[x].size(); l++) ^