Compilare: user.cpp: In function ‘int BF()’: user.cpp:9:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define sz size() ^ user.cpp:32:26: note: in expansion of macro ‘sz’ for(j=0;j<G[nod].sz;j++) ^ user.cpp: In function ‘int main()’: user.cpp:9:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define sz size() ^ user.cpp:62:21: note: in expansion of macro ‘sz’ for(i=0; i<G[N].sz; i++) ^ user.cpp:53:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&N,&M); ^ user.cpp:56:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&x,&y,&z); ^