Compilare: user.cpp: In function ‘void df(int, int)’: user.cpp:24:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(cost!=0) ^ user.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i+=2) ^ user.cpp: In function ‘void citire()’: user.cpp:42:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:45:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&a,&b,&c); ^