Vinish and Bharath Play a Game

Vinish and Bharath were getting bored in their class,so they decided to play a game. The game is as follows,initially there is a single array containing N white cells.Both take turns alternately, and in each turn a player can mark any one cell of the array as black.They define a block of 3 consecutive black cells as a streak.The first one to create a streak wins and is declared as the winner. Bha