//I have correct in the IDE, what's wrong?

import java.io.IOException;
import java.util.Scanner;

public class VasyaCare{
    public static void main(String[] args) throws IOException {
    VasyaCare vasya_care = new VasyaCare();
    Scanner scn = new Scanner(System.in);
    int n = scn.nextInt();
    try{                               // Check
            if(n < 10){
        double[] b = vasya_care.setScore(n);
        double median = vasya_care.getMedian(b);
        if(median==3){
            System.out.println("None");
        }
        else if(median==5){
            System.out.println("Named");
        }
        else if(median >= 4.5){
            System.out.println("High");
        }
        else if(median < 4.5){
            System.out.println("Common");
        }
        }
        else throw new IOException("Please, type number from 1 to 10!");
    }
    catch(Exception e){e = new IOException();}
    }


    double getMedian(double[] b{          // calculate median score of exam
    int sum = 0;
    for(int i = 0; i < b.length; i++){
        sum = (int) (sum + b[i]);
    }
    return (double)sum/b.length;
    }

    double[] setScore(int n){            // forming list scores
    Scanner scn = new Scanner(System.in);
    double[] b = new double[n];{
        for(int j = 0; j < n; j++){
            int m = scn.nextInt();
            if(m<3 || m > 5){
                System.out.println("Type score from 3 to 5: ");
                j--;
            }
            else if (m>=3 && m<=5){
                b[j] = m;
            }
        }
    }
    return b;
    }
}

// Thank you for your attention!

If Vasya has at least one note 3 scholarship is 'None'.
So, 355555555... is no scholarship.
Sorry if you considered that,  I have read your code very careless.

You're wrong, sorry, there is my testing:

Input
Type number exam:
8

Type score:
3
Type score:
5
Type score:
5
Type score:
5
Type score:
5
Type score:
5
Type score:
5
Type score:
5
3.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 average score: 4.75

Output:
High

I really don't understand, what's wrong. ((

I have just copied code from my Accepted submissions.
http://ideone.com/vWEL58
I think the problem is easy enough
To let post AC code be legal.

So there correct answer is "None"  and dialog interface is not needed.  Moreover, in most cases,there should be no  dialog interface to get AC.

You have "none" because your case "cur=int (input ()) if cur==3:..." does not check for the average score and passes at runtime immediately. You must check the average score in all cases, not the input variable.

Are you a troll?
That is Accepted code.
If you copy &  paste you AC.