1 read roadLength:int initialStones:int
3 read trollDistance:int stones:int opponentStones:int
7 Keep the troll out of your castle!
10 roadLength: the distance (even) between both castles. The troll starts at half that distance.
11 initialStones: the number of stones each castle starts with.
12 trollDistance: distance between the troll and your castle. Keep it above zero!
13 stones: number of stones left.
14 opponentStones: number of stones left to your opponent.
17 number of stones to shoot at the troll.