import java.io.*;

class StudDetail
{
       int RollNo;
}

class StudMarks extends StudDetail
{
            float sub1;
            float sub2;
            float sub3;
            float TotalMarks;

            void getdata()
            {
                  System.out.println("\nRecording Entry");
                  try{
                      BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
                      String sRNo,sSub1,sSub2,sSub3;
                      
                      System.out.print("Enter Roll No : ");
                      System.out.flush();
                      sRNo=obj.readLine();
                      RollNo=Integer.parseInt(sRNo);

                      System.out.print("Enter Marks for Subject 1 : ");
                      System.out.flush();
                      sSub1=obj.readLine();
                      sub1=Float.parseFloat(sSub1);
  
                      System.out.print("Enter Marks for Subject 2 : ");
                      System.out.flush();
                      sSub2=obj.readLine();
                      sub2=Float.parseFloat(sSub2);

                      System.out.print("Enter Marks for Subject 3 : ");
                      System.out.flush();
                      sSub3=obj.readLine();
                      sub3=Float.parseFloat(sSub3);

                      TotalMarks=sub1+sub2+sub3;
                      }
                      catch(Exception e){}
            }

            void display()
            {
                   System.out.println("\nDisplaying Record");
                   System.out.println("Roll No : "+RollNo);
                   System.out.println("Subject 1 : "+sub1);
                   System.out.println("Subject 2 : "+sub2);
                   System.out.println("Subject 3 : "+sub3);
                   System.out.println("Total Marks : "+TotalMarks);
           }

           void totalMarks()
           {
                  System.out.println("\nDisplaying Total Marks");
                  System.out.println("Roll No : "+RollNo);
                  System.out.println("Total Marks : "+TotalMarks);
            }
                        
}

class  StudentDatabase
{
    publicstaticvoid main(String args[]) 
    {
             System.out.println("\n=====STUDENT DATABASE=====\n");

             
            float HighMark_sub1;
            float HighMark_sub2;
            float HighMark_sub3;
            float StudHighMark;
            int No_of_stud=3,choice;
            String str;
            char c;

               try{
                    BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
                    System.out.print("\nEnter number of Students  : ");
                    System.out.flush();
                    str=obj.readLine();
                    No_of_stud=Integer.parseInt(str);
                    StudMarks SMobj[]=new StudMarks[No_of_stud];

                    while(true)
                    {                             
                                    System.out.println("\nChoose your choice...");
                                    System.out.println("1) PASS ENTRY");
                                    System.out.println("2) DISPLAY ALL RECORDS");
                                    System.out.println("3) DISPLAY TOTAL MARKS for all students");
                                    System.out.println("4) DISPLAY HIGHEST MARKS in each subject");
                                    System.out.println("5) DISPLAY student who recived highest total marks");
                                    System.out.println("6) Exit ");
                                    System.out.print("Enter your choice : ");
                                    System.out.flush();
                                    str=obj.readLine();
                                    choice=Integer.parseInt(str);

                                    switch(choice)
                                    {
                                           case 1 :     for(int i=0;i<No_of_stud;i++)
                                                                     SMobj[i].getdata();
                                                              break;
                                            case 2 :    for(int i=0;i<No_of_stud;i++)
                                                                      SMobj[i].display();
                                                                break;
                                            case 3 :    for(int i=0;i<No_of_stud;i++)
                                                                       SMobj[i].totalMarks();
                                                                break;
                                            case 4 :     break;
                                            case 5 : break;
                                            case 6 : System.out.println("\nThanks for Visiting ....");
                                                           System.exit(1);
                                    }
                         }
                   }
                catch(Exception e){}              

    }
}