Compilare: user.cpp: In function ‘void DFS(int, int, int)’: user.cpp:34:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:44:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:46:34: warning: unused variable ‘c’ [-Wunused-variable] int neighb = G[node][i], c = C[node][i], d = D[node][i]; ^ user.cpp:46:50: warning: unused variable ‘d’ [-Wunused-variable] int neighb = G[node][i], c = C[node][i], d = D[node][i]; ^ user.cpp:33:9: warning: unused variable ‘Max’ [-Wunused-variable] int Max = 0; ^ user.cpp: In function ‘void Read()’: user.cpp:15:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:19:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &x, &y, &c, &d); ^ user.cpp: In function ‘int main()’: user.cpp:58:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arb2.in", "r", stdin); ^ user.cpp:59:37: 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); ^