Two players and coins

Two players ‘A’ and ‘B’ are playing a game. They were given N number of coins where ‘N’ is even and they will get alternative turns in which player can select a coin from one of the end. The winner is the player with maximum amount of sum. At what position first or second does player ‘A’ need to start the game in order to win the game and how much ‘A’ can collect starting at that position. Inpu