Compilare: user.cpp: In function ‘int main()’: user.cpp:64:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[mid].size()>=p) ^ user.cpp:13:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:15:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&w[i]); ^ user.cpp:48:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:50:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&p,&c); ^ user.cpp:46:30: warning: ‘mid’ may be used uninitialized in this function [-Wmaybe-uninitialized] v[mid].push_back(x[i]); ^