mancala-bot.rb

# Matthew Jee's (mcjee) solution to the Mancala challenge on the HackerRank Back-to-School Hackathon
def printNextMove(player, player1Mancala, player1Marbles, player2Mancala, player2Marbles)
    if player == 1
        mymarbles = player1Marbles
        opmarbles = player2Marbles
    else
        mymarbles = player2Marbles
        opmarbles = player1Marbles
    end
    
    overflows = []
    scores = []
    nets = []
    mymarbles.each_index do |x|
        n = mymarbles[x]
        overflows[x] = [n-6+x, 0].max #works for n < 14
        scores[x] = (n+x+7) / 13
        
        extra = 0
        landpos = x+mymarbles[x]%13
        if landpos < 6
            if mymarbles[landpos] == 0
                extra += opmarbles[5-landpos]*0.25
            end
        end
        nets[x] = scores[x]-(overflows[x]*0.3)**2+extra;
    end
    #print nets
    max = -9999
    maxindex = 0
    mymarbles.each_index do |x|
        if nets[x] >= max && mymarbles[x] > 0
            max = nets[x]
            maxindex = x
        end
    end
    puts maxindex+1    
end