Compilare: user.cpp: In function ‘bool bellman()’: user.cpp:5:20: warning: integer overflow in expression [-Woverflow] #define oo (1<<31)-1 ^ user.cpp:16:14: note: in expansion of macro ‘oo’ D[i]=oo; ^ user.cpp:5:20: warning: integer overflow in expression [-Woverflow] #define oo (1<<31)-1 ^ user.cpp:38:14: note: in expansion of macro ‘oo’ if(D[d]==oo)return 0; ^ user.cpp: In function ‘int main()’: user.cpp:51:33: 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:52:35: 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:53:29: 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:58:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&c); ^