NZEC--Plzzzz Help

[aknitd]

I have been getting NZEC for many problems.I can't find the overflows which are held accountable for NZEC.I am getting correct results even for the boundary cases on my machine.Plzz suggest what is going wrong.
Some of the problems showing NZEC are:
http://www.spoj.pl/problems/ETF/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
public class Main {
    /**
 * @param args the command line arguments
 */
public static void main(String[] args) throws IOException
{
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    PrintWriter pw=new PrintWriter(new OutputStreamWriter(System.out));
    int test=Integer.parseInt(br.readLine());
    int i=0,j=0,k=0,k1=0;
    int num=0,res=0;
    int[] fact;
    boolean[] arr;
    for(i=0;i<test;i++)
    {
        res=0;
        k=0;
        num=Integer.parseInt(br.readLine());
        arr=new boolean[num+1];
        fact=new int[num+1];
        for(j=2;j*j<=num;j++)
        {
            if(num%j==0)
            {
                fact[k++]=j;
                arr[j]=true;
                res++;
                fact[k++]=num/j;
                arr[num/j]=true;
                res++;

            }
        }
        j--;
        if(Math.sqrt(num)==j)
        {
            k=k-1;
            res=res-1;
        }
        for(j=0;j<k;j++)
        {
            k1=2;
            while(fact[j]*k1<num)
            {
                if(!arr[fact[j]*k1])
                {
                    arr[fact[j]*k1]=true;
                    res++;
                }
                k1++;
            }
        }
        if(num==1)
        {
            pw.println(1);
        }
        else
        {
            pw.println(num-res-1);
        }
    }
    pw.flush();
    // TODO code application logic here
}
}

https://www.spoj.pl/problems/DIVSUM/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {
    /**
 * @param args the command line arguments
 */
public static void main(String[] args) throws IOException
{
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    int i=0,j=0;
    int num=0;
    int sum=1;
    int test=Integer.parseInt(br.readLine());
    for(i=0;i<test;i++)
    {
        sum=1;
        num=Integer.parseInt(br.readLine());
        for(j=2;j<=Math.sqrt(num);j++)
        {
            if(num%j==0)
            {
                if(j!=(num/j))
                {
                    sum=sum+j+(num/j);
                }
                else
                {
                    sum+=j;
                }
            }
        }
        System.out.println(sum);
    }
    
    // TODO code application logic here
}
}

https://www.spoj.pl/problems/TWOSQRS/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
public class Main {
    /**
 * @param args the command line arguments
 */
public static void main(String[] args) throws IOException
{
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    PrintWriter pw=new PrintWriter(new OutputStreamWriter(System.out));
    int test=Integer.parseInt(br.readLine());
    int i=0,j=0,pow=0;
    long num=0,numb=0;
    for(i=0;i<test;i++)
    {
        num=Long.parseLong(br.readLine());
        if(num==0)
        {
            pw.println("Yes");
            continue;
        }
        numb=num;
        pow=0;
        while(num%2==0)
        {
            pow++;
            num/=2;
        }
        j=3;
        boolean b=false;
        while(num>1 && j<=numb)
        {
            pow=0;
            while(num%j==0)
            {
                pow++;
                num/=j;
            }
            if(j%4==3 && pow%2!=0)
            {
                pw.println("No");
                b=true;
                break;
            }
            j=j+2;
        }
        if(!b)
        {
            pw.println("Yes");
        }
    }
    pw.flush();
    // TODO code application logic here
}
}

[leppyr64]

Welcome!

This is not the forum to post this in, or the way to post it. Please post this in the ProblemSet Archive. Please post it in three seperate posts, one for each problem. Title each post with the name of the problem, as you have done with the links. Other than that, you have made an excellent post!