Compilare: user.cpp: In function ‘void bf(int, int)’: user.cpp:42:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<A[nod].size(); i++) ^ user.cpp: In function ‘void cons_graph(int)’: user.cpp:66:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<A[i].size(); j++) ^ user.cpp: In function ‘int BF()’: user.cpp:87:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<A[nod].size(); i++) ^ user.cpp: In function ‘void read()’: user.cpp:20:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&m,&g); ^ user.cpp:24:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x,&y,&z); ^ user.cpp: In function ‘int main()’: user.cpp:127:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trafic.in","r",stdin); ^ user.cpp:128:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("trafic.out","w",stdout); ^