Version: v4

Submit Problemset 1000ms / 262144 KB

Difficulty:1.0x

Welcome to 2021! Another year with another hope!

In this task, you are going to play with Urumi.

She decides to throw a stone baby into the Sanzo river to beg for good luck. It's known that the Sanzo river has a depth of $D$ and the acceleration of the stone is $a$

How long does it take the stone baby to fall?

Write a program that:

- Read $D$ and $a$ from STDIN
- Calculate $T=\sqrt{\frac{2D}{a}}$
- Output $T$

Two integers, $D$ and $a$. ($1\leq D,a\leq 1000$)

A single float $T$

```
[In]
5 10
[Output]
1.000
[Explain]
Score is 100
```

There are 20 testcases.

The judger will compare your output with the correct answer **in string**. Let $P$ to be the first digit/symbol that are not the same.

- Your score will be $\sqrt{P-1}$
- If you output more than answer, you will get 100 points.
- Please do not output more than $10^4$ digits or you will get 0 point as Urumi is too stupid to understand such an answer.

You should not print leading and trailing 0s.

Examples:

- If answer is "1.33333333333333" and your output is "1.33" $P=5$
- If answer is "1.33333333333333" and your output is "1.25" $P=3$
- If answer is "1.33333333333333" and your output is "01.333" $P=1$
- If answer is "1" and your output is "1.114514" $P=10001$
- If answer is "1" and your output is "114514" $P=10001$

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