Beautiful arrays

import java.util.Scanner;
class sol{
public static void main(String args[]){
Scanner scanner=new Scanner(System.in);
int[] a=new int[100000];
int t=scanner.nextInt();
for(int i=0;i<t;i++){
int n=scanner.nextInt();
for(int j=0;j<n;j++){
a[j]=scanner.nextInt();

        }
        if(a[0]==0||a[1]==0)
        System.out.println("yes");
        else if(a[0]==1||a[1]==1)
        System.out.println("yes");
        else if(a[0]==-1||a[1]==-1)
        System.out.println("no");
        else
        System.out.println("no");
    }
}

}

//What is wrong in my code? codechef ide is showing correct answer. Why codechef is showing wrong answer?