"Instead of playing eighty today, let''s play something else." At nine o''clock in the evening, Xiao Yao took a playing card to the three unscrupulous roommates in the dormitory.


    After more than 20 days of training, Xiao Yao has little hope of becoming a member of the national team of Olympiad Mathematics. Xiao Yao''s attitude towards this is quite calm, but he is still unwilling to be raped by three roommates playing cards in the dormitory. Eighty points can''t really play with them. Today Xiao Yao just changed his style.


    "You can''t play us anything," Yan Ke said with an arrogant smile. "At most, we can win our first few games while we are not familiar with the rules. Do you want to change a way of playing every day just to win our first few games?"


    "Cut ~" Xiao Yao disdained to curl his lips and ignored him.


    Chen Jiwei waved his hand to Yan Ke and Yu Gang and said, "well, we''ve been bullying people for a long time. People want to change their play and find some confidence. Let''s just make do with them." Then he turned his head and asked Xiao Yao, "what are you playing today?"


    "21 o''clock! Will you? " Xiao Yao said with a smile.


    "No!" Chen Jiwei and Yu Gang replied at the same time.


    "21 o''clock?" Yan Ke obviously will, but some surprised way: "playing cards can, but the rules of training, is strictly prohibited gambling."


    In the two hours'' spare time from 9:00 to 11:00, Xiao Yao was not the only one playing cards. Teachers are not forbidden to play cards. On the one hand, there is no TV in the dormitories of middle school students, and the students are really bored at night. On the other hand, most of them have to use their brains to play cards, so they have the right to take it as extracurricular training.


    However, for these teenagers, we can not completely indulge. The teachers strictly prohibited the students from gambling by playing cards. Once found, will be immediately expelled from the winter camp training team.


    "If you don''t play with money, it''s not gambling." Xiao Yao explained with a smile, "I prepared melon seeds, green beans, milk candy and chocolate. Each of them has a big package. We take these things to represent different scores. Everyone will get the same score at the beginning, and the final result will be determined by the score of what they have. "


    "Yes." Three people think, this is feasible. Yu Gang was still a little reluctant: "how can we all have some color? How boring it would be to play. If you don''t play 80 points before, the loser will be responsible for dormitory sanitation? "


    Yu Gang said, three people''s eyes all Piao to Xiao Yao. Ignoring the three people''s expectation, Xiao Yao shook his head and refused: "I''ve been cleaning for more than ten days. Change the rules today. If you lose, treat you to dinner tomorrow. "


    "That''s OK. Big stars have money anyway." The three joked.


    "Don''t be complacent. I''ll eat you tomorrow." Xiao Yao''s vicious way.


    "First of all, I''ll give you two rules of explanation. In short, it''s about the number of points. Flower jqk is 10 o''clock, a can do 11 o''clock or a little bit. The total number of 21 is the highest, more than the explosion, not higher than 21 who points who win. Bet before deal. At the beginning, each player dealt two cards, the leisure player two cards, and the dealer one card and one card. Under the condition of less than 21 points, you can ask for another card until it explodes. Get a plus 10 cards, that is, two cards constitute 21 points, called blackjack, the dealer compensate 1.5 times, of course, the premise is that the dealer did not get the same BJ, or it is a draw. If the starting points of the two cards are the same, you can choose to divide the cards. If you meet the same points again, you can also choose to divide them again. At most, one card is divided into three, but the number of extra cards must be added with the same note. After dividing the cards, each family calculates the winning and losing separately. Do you understand? " Xiao Yao looks at two people.


    "I understand!" The IQ of two guys who can enter the Olympic mathematics winter camp must be high. Xiao Yao explains it so clearly, how can he not understand it?


    "Well, then. I''ll be the village! " With that, Xiao Yao took out five pairs of brand-new playing cards from the table one after another.


    "Shit! Do you want so much? " Three people looked at five pairs of cards and widened their eyes.


    "It''s time to test your brains." After removing the big and small kings and an extra match card, Xiao Yao mixed five pairs of cards and washed them together. He said while shuffling, "I know you play cards by your brain, not by luck. If you can build up a mathematical model or formula to count cards, increase the probability of winning, and prove that it really works. In the future, I''ll take you to Macheng or Meidi''s Las Vegas. "


    "True or false?" Three people a face excited way. If others say so, the three must be suspicious, but Xiao Yao has the identity of a star. Whether he goes to Macheng or Meidi, it''s really not too difficult for him.


    "Don''t be happy too soon. This is not the 80 points of the two deck cards. You can count the main card and the score card in other people''s hands from the card path and the cards that have been played. " Xiao Yao threw cold water on the three and said, "these are five sets of cards, and it''s hard for you to understand your opponent. Your choice is to take or not to take. Even if you are all mathematical genius, it is not easy for you to come up with such a mathematical model or formula. If there is no way to ensure that you can improve the chance of winning, I will not take you rashly"What do you want?" The more they listened to Xiao Yao, the more confused they felt.


    "I want to play big." Xiao Yao said with a smile: "I want to capture the gambling city."


    "How to capture?" Three people surprised way: "depend on 21 o''clock?"


    "Math! The way is through 21 o''clock! " Xiao Yao pointed to his temple and said, "among all the projects in the casino, except slot machines, the least human factor is blackjack. Each table is five sets of cards, and they are all shuffled through the shuffling machine. The Dutch officials, that is, the makers, are all trained in the same way. It is regular to ask for cards and not to ask for them. I think we can rely on mathematics to improve the chance of winning money by playing blackjack. "


    "How do you know so well?" Yan Ke asked curiously, "have you ever played in a casino?"


    "No Xiao Yao shook his head.


    "Then how do you know you can win money in casinos with math?" Yu Gang also asked.


    "I know from the way you abused me the other day." Xiao Yao said with a bitter smile, "why do I always lose 80 points to you? Is experience inferior to you? I taught you the rules. Is memory inferior to you? Who dares to recite English words like me? It''s not because your math is better than mine, and you can count cards better than me. Eighty points count, but 21 is not? "


    "Can I tell you that there was a guy named Ma Kaiwen who did it with his companions in his previous life?" Xiao Yao added another word in his heart.


    When Xiao Yao was a child, he grew up watching such films as Fage''s God of gamblers, Huazai''s gambler and Xingye''s gambler. Although at that time, like other people, he was fascinated by all kinds of card playing skills in gambling films for a period of time, Xiangjiang''s gambling films seemed too exaggerated, and he never wanted to connect with real life.


    Until 2008, when he was an adult, he saw an American gambling film called "decisive battle Blackjack". To tell you the truth, the film is not very good on the whole, but the plot of counting cards to increase the chance of winning money and winning a lot of dollars from the casino still impressed him deeply.


    After a little investigation, he was surprised to find that the film was based on real people. The protagonist, Kevin Ma, is a Chinese American Mathematical Genius at MIT. Ma Kaiwen and his companions made about $10 million from casinos over the years by counting cards. The United States not only made films based on his deeds, but also made best-selling books about the stories of Ma Kaiwen and his companions. Since then, Ma Kaiwen''s name and deeds have been deeply imprinted in his mind.


    Xiao Yao was not a mathematical genius in his previous life. He could only sigh about the deeds of Ma Kaiwen. But Xiao Yao is not the same in today''s world. Although he is not a mathematical genius, there is no Ma Kaiwen in this world, and no one has ever set off a "bloodbath" in Las Vegas with counting cards. Xiao Yao wants to set up his own 21:00 group to go to the casino and do whatever he likes. It''s not impossible at all.


    Some time ago, while being ravaged by three guys in the same dormitory every day, Xiao Yao also found that the three seem to have some talent in using mathematical card counting. As he said, whether it''s playing experience or memory, he is better than the three, such a loss, only because they can count cards. Did not expect to participate in a mathematics winter camp, was beaten to pieces at the same time accidentally found three in the card quite talented guy. Xiao Yao deeply buried in the memory of this crazy idea some ready to move.


    See three people some hesitation and some heart beating tangled expression, Xiao Yao continued with a smile: "you also don''t so tangled, I just have such an idea, conveniently mention it, not tomorrow or next year we will do this thing."


    "According to Meidi''s law, you must be 21 years old to enter the casino. I''m still five years away." Xiao Yao went on to introduce, "and it''s not so easy to find a way to improve the chance of winning money. We are all high school students now, so it''s not sure whether we can get it out by the current mathematical knowledge." When Ma Kaiwen joined the blackjack card counting group in his previous life, he was a top three student in MIT. Now these middle school students are certainly not as good as him.


    "What I mean is that we should take this as a long-term goal. When we find an effective way to count cards, when we can do it again. A Mr. Ma once said, "dreams always come true. What if they come true?" Xiao Yao quoted the classic saying of Ma Yun in his previous life.


    "Which Mr. Ma?" Chen Jiwei asked with a confused face.


    "That''s not the point." Xiao Yao waved his hand, "the key is whether we can find an effective way to count cards. Let''s not treat it as a gamble, but as a math problem. When we solve it, we need to use a way to shock the world to let everyone know. "


    "But I don''t think that''s going to happen until college. The first is that we were old enough to enter casinos at that time. The second is that we may have to master the mathematical knowledge to support the theoretical basis of our card counting. The third is that we will have the personal freedom to run around at that time. " Xiao Yao clapped his hands and finally concluded, "so, I hope you can have such an idea in your mind now and work hard in this direction. I hope in a few years, we can really do it. ""Well, that''s interesting. Let''s do it!" Yu Gang''s first response.


    "It''s exciting to think about it." Chen Jiwei also rose red face, excited way.


    "We just treat it as a math problem. I don''t believe we can''t solve it in a few years." Yan Ke was also convinced.


    "OK, you''ll be responsible for solving the problem. I''ll be responsible for other aspects." Xiao Yao nodded with a smile.


    Now the world is at the beginning of 2015, and the development of science and technology is far from comparable to that in the mid-1990s. Xiao Yao can''t spend several years in casinos like Ma Kaiwen and win tens of millions of dollars. What he wants is to live a life long addiction.