Compilare: user.cpp: In function ‘int main()’: user.cpp:34:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (!w[nod]){for (i=0;i<v[nod].size();i++) ^ user.cpp:23:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(h2,"%d%d",&n,&m); ^ user.cpp:25:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(h2,"%d%d%d",&a,&b,&c); ^