Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:56:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:71:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:73:34: warning: unused variable ‘c’ [-Wunused-variable] int neighb = G[node][i], c = C[node][i], d = D[node][i]; ^ user.cpp:73:50: warning: unused variable ‘d’ [-Wunused-variable] int neighb = G[node][i], c = C[node][i], d = D[node][i]; ^ user.cpp:55:9: warning: unused variable ‘Max’ [-Wunused-variable] int Max = 0, father = 0; ^ user.cpp: In function ‘int main()’: user.cpp:86:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arb2.out", "w", stdout); ^