NZEC is annoying

[Snip3r]

Hi
spoj.pl/problems/PHONELST/
for the above i keep getting NZEC though it runs fine in my machine. Can someone help?Heres my code

import java.util.Scanner;
import java.util.Arrays;
class Phonelist{
	int test_cases;
	String[][] nums;
	public static void main(String args[]){
		new Phonelist().go();
	}
	void go(){
		readInput();
		int len;
		int k;boolean found;
		for(int i=0;i<test_cases;i++){
			found=false;
			Arrays.sort(nums[i]);
			for(int j=0;j<nums[i].length-1;j++){
				len=nums[i][j].length()>nums[i][j+1].length()?nums[i][j+1].length():nums[i][j].length();
				for(k=0;k<len;k++)
					if(nums[i][j].charAt(k)!=nums[i][j+1].charAt(k))
						break;
				if(k==len){
					found=true;
					break;
				}
			}
			if(found)
				System.out.println("NO");
			else
				System.out.println("YES");
		}
	}
	void readInput(){
		try{
			Scanner s=new Scanner(System.in);
			Scanner ss=new Scanner(System.in);
			test_cases=s.nextInt();
			nums=new String[test_cases][];
			for(int i=0;i<test_cases;i++){
				nums[i]=new String[s.nextInt()];
				for(int j=0;j<nums[i].length;j++)
					nums[i][j]=ss.nextLine();
			}
		}
		catch(Exception e){
			System.err.println("Oops!");
		}
	}
}

[leppyr64]

Why are you declaring two scanners on the same input? That's the likely cause of your error.

[Snip3r]

thats cos i found something wierd when i use a single scanner for reading both int and string.I would recommend you to try that it will accept 1 less input for each test case.when i used 2 scanners it ran fine(in my pc)

[leppyr64]

It doesn't run "fine" that's for sure. If you're taking input from the command line, then it seems to run fine, but if stdio is redirected from a file you'll have an issue.

nextInt doesn't move to the next line, it leaves the end of line characters in the stream. Therefore nextLine reads an empty string.

[Snip3r]

thx!i resolved it