xiaofang3a的专栏

Problem Description 春天到了, HDU校园里开满了花, 姹紫嫣红, 非常美丽. 葱头是个爱花的人, 看着校花校草竞相开放, 漫步校园, 心情也变得舒畅. 为了多看看这迷人的校园, 葱头决定, 每次上课都走不同的路线去教室, 但是由于时间问题, 每次只能经过k个地方, 比方说, 这次葱头决定经过2个地方, 那他可以先去问鼎广场看看喷泉, 再去教室, 也可以先到体育场跑几圈, 再

Problem Description Lele now is thinking about a simple function f(x). If x If x >= 10 f(x) = a0 * f(x-1) + a1 * f(x-2) + a2 * f(x-3) + …… + a9 * f(x-10); And ai(0 Now, I will give a0 ~ a9 and t

Problem Description Without expecting, Angel replied quickly.She says: "I'v heard that you'r a very clever boy. So if you wanna me be your GF, you should solve the problem called GF~. " How good an

斐波那契数列的定义如下： F(0) = 0 F(1) = 1 F(n) = F(n - 1) + F(n - 2) (n >= 2) (1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, ...) 给出n，求F(n)，由于结果很大，输出F(n) % 1000000009的结果即可。 Input 输入1个数n(1 Out