CF667A Pouring Rain

题目描述

有一个直径为 $d$ **厘米**的水桶。 原先桶里水深度为 $h$ **厘米**。 你在喝桶里的水,喝水的速度是 $v$ **毫升每秒**。 不喝水时桶内水面上升速度为 $e$ **厘米每秒**。 现在一边下雨,你一边喝桶里的水。 如果你喝的速度赶不上降水速度,输出"NO",否则输出"YES"和你需要几秒喝光水。

输入格式

输出格式

说明/提示

In the first example the water fills the cup faster than you can drink from it. In the second example area of the cup's bottom equals to ![](https://cdn.luogu.com.cn/upload/vjudge_pic/CF667A/506f4185894e124cfe58ffcf17b4313e000f33cd.png), thus we can conclude that you decrease the level of water by ![](https://cdn.luogu.com.cn/upload/vjudge_pic/CF667A/579d2432e4049c40694278bdc86f2d43bba8e53d.png) centimeters per second. At the same time water level increases by $ 1 $ centimeter per second due to rain. Thus, cup will be empty in ![](https://cdn.luogu.com.cn/upload/vjudge_pic/CF667A/382da3ace88e5a3c5ce7f6802c7bb69b4823da44.png) seconds.