两人各有N张牌，轮流出牌，每次一个人把牌叠在上一次出的牌的上 方，如果这时发现当前的牌与前面的牌有重复，那么这之间的牌就都归出牌人了，收回去 的牌不会再被打出。芒果先出牌。请你计算一下第一轮下来芒果和冰沙获得的牌数-They have N cards, turn the cards, the card each time a stack of cards in the last of the top, if the current card and then find the card