Compilare: user.cpp: In function ‘int main()’: user.cpp:29:21: warning: integer overflow in expression [-Woverflow] #define INF (1<<31)-1 ^ user.cpp:52:32: note: in expansion of macro ‘INF’ for (i=1;i<=N;i++) cost[i]=INF; ^ user.cpp:29:21: warning: integer overflow in expression [-Woverflow] #define INF (1<<31)-1 ^ user.cpp:58:24: note: in expansion of macro ‘INF’ if (cost[nod]==INF) continue; ^ user.cpp:43:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.in","r",stdin); ^ user.cpp:44:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bellmanford.out","w",stdout); ^ user.cpp:45:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&N,&M); ^ user.cpp:49:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&z); ^