/*W.A.P. TO DISPLAY THEW FOLLOWING PATTERN WHERE THE ROW NUMBER IS ENTERED BY THE USER 
0
1 0
0 1 0
1 0 1 0...........
FOR N NUMBER OF ROWS*/0
1 0
0 1 0
1 0 1 0...........
import java.io.*;
class pat
{
 public static void main(String args[])
 {
    int i,j,n,k;
    DataInputStream in=new DataInputStream(System.in);
  try
  {
    System.out.print("Enter a no");
    n=Integer.parseInt(in.readLine());
       for(i=1;i<=n;i++)
       {
         k=i%2;
         for(j=1;j<=i;j++)
          {
            System.out.print(k);
             k=1-k;
          }
        System.out.println();
       }
   }
   catch(Exception e){}
 }
}
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