LightOJ 1104 Birthday Paradox【概率】
参看资料:https://baike.baidu.com/item/%E7%94%9F%E6%97%A5%E6%82%96%E8%AE%BAhttp://www.cnblogs.com/-maybe/p/4521247.html题目:Sometimes some mathematical results are hard to believe. One of the common...