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Code Transmitting and memorizing information is a task that requires different coding systems for the best use of the available space. A well known system is that one where a number is associated

Round Numbers The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors', 'Ro, Sham, Bo', and a host of other na

在看牛客网给的题解的参考资料的时候看到了生成函数 不太懂就去查了一下 感觉真的太奇妙了 拍案叫绝 今天数学教我做人   参考：http://www.cppblog.com/MiYu/archive/2010/08/05/122290.html 生成函数（母函数）的定义是 有一个数列{an} = {a0, a1, a2, a3, ......, an} 他的生成函数就是f(n) = ...