Meeting Place

There is an N*N grid where (r,c) denotes a cell number where r means row number, c means column number. You are in the (0,0) cell and your friend is in the (N, N) cell. You start from (0,0) and want to reach (N,N). Your friend starts from (N,N) and wants to reach (0,0). You can only move upward or right direction and your friend can only move downward or left direction.

This is a companion discussion topic for the original entry at