Compilare: user.cpp: In function ‘int main()’: user.cpp:53:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<H[i].size();j++) ^ user.cpp:32:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d",&N); ^ user.cpp:35:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d",&X,&Y,&R); ^