Help me in solving ODDPAIRS problem

help
,
1

My issue

My code

/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    Scanner sc=new Scanner (System.in);
	    int t=sc.nextInt();
	    while(t-->0)
	    {
	        int n=sc.nextInt();
	        int c=0;
	        for (int i=0;i<n;i++)
	        {
	            for (int j=0;j<i;j++)
	            {
	                if ((i+j)%2!=0) c++;
	            }
	        }
	        System.out.println(c*2);
	        
	    }
		
	}
}

Problem Link: ODDPAIRS Problem - CodeChef