Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:35:29: warning: statement has no effect [-Wunused-value] viz[vf[poz]]==1; ^ user.cpp: In function ‘int main()’: user.cpp:49:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&n,&m); ^ user.cpp:52:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&x,&y); ^