Question

Source code:

import java.util.Arrays;


class Uglynumbers {

/**
 * @param arg
 */
public static void main(String[] args) {
    // TODO Auto-generated method stub
    long[] ugly= new long[1510];
    long inter1,inter2,inter3;
    int count=0;
    boolean found1=false,found2=false,found3=false;

    ugly[0]=1;
    ugly[1]=2;
    ugly[2]=3;
    ugly[3]=5;
    count=4;
    for (int i=1; i<1500;i++)
    {
        found1=found2=found3=false;
        inter1= ugly[i]*2;
        inter2= ugly[i]*3;
        inter3= ugly[i]*5;

        for(int z=count-1;z>=0;z--)
        {
            if((inter1>ugly[z]) && (inter2>ugly[z]) && (inter3>ugly[z]))
                break;
            else
            {
             if(ugly[z]==inter1)
                found1=true;
             if(ugly[z]==inter2)
                found2=true;
             if(ugly[z]==inter3)
                found3=true;
            }

            if( found1 && found2 && found3)
                break;
        }

        if(!found1)
        {

            ugly[count]=inter1;
            count+=1;

        }

        if(!found2)
        {

            ugly[count]=inter2;
            count+=1;

        }

        if(!found3)
        {

            ugly[count]=inter3;
            count+=1;

        }

        Arrays.sort(ugly,0,count);


        if(count>=1500)
            break;

        }


System.out.println("The 1500'th ugly number is "+ ugly[1499]);


System.exit(0);


}

};

When I run this code in eclipse its working fine. But when i give it UVA online judge, am getting following run time error: “”136 – Ugly Numbers has failed with verdict Runtime error.
This means that the execution of your program didn’t finish properly. Remember to always terminate your code with the exit code 0″.”

What am missing in the code?

Answer 1

It seems that it requires the class to be called Main.

http://code.google.com/p/collatz-deandalm/issues/detail?id=13

EDIT:

Entire Java specification:

http://uva.onlinejudge.org/index.php?option=com_content&task=view&id=15&Itemid=30

Java Specifications:
The Java programs submitted must be in a single source code (not .class) file. Nevertheless, you can add as many classes as you need in this file. All the classes in this file must not be within any package.

All programs must begin in a static main method in a Main class.

Do not use public classes: even Main must be non public to avoid compile error.

Use buffered I/O to avoid time limit exceeded due to excesive flushing.

As a reference, we provide a sample Java code

Get rid of this:

System.exit(0);

And change Uglynumbers to Main.