Compilare: user.cpp: In function ‘int main()’: user.cpp:19:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(H.size()+(M<=P)>=N) ^ user.cpp:13:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&N,&P); ^ user.cpp:16:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&val); ^