Compilare: user.cpp: In function ‘bool Bellman()’: user.cpp:31:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < Graph[X].size(); i++){ ^ user.cpp:19:12: warning: unused variable ‘Z’ [-Wunused-variable] int X, Y, Z, A = 1, B = 0; ^ user.cpp: In function ‘int main()’: user.cpp:47:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmcm.in","r",stdin); ^ user.cpp:48:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmcm.out","w",stdout); ^ user.cpp:50:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &N, &M, &E); ^ user.cpp:52:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &X, &Y, &Z); ^