Compilare: user.cpp: In function ‘void biconex(int, int)’: user.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a[nod].size();i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:78:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<pct.size();i++) ^ user.cpp:84:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<art.size();i++) ^ user.cpp: In function ‘void citire()’: user.cpp:19:28: 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:22:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&x,&y); ^