P405217 - GYM101848 A Modulo - SSOJ - 省实信息奥赛评测系统

Memory Limit：512 MB Time Limit：1 S

Judge Style：Text Compare Creator：

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A. Modulotime limit per test1 secondmemory limit per test512 megabytesinputstandard inputoutputstandard output

As a simple and boring task, you are asked to do modulo on floating numbers.

Given a, b, please calculate $\text{[math]}$ .

Notice that the modulo supported by some programming languages like C++, Java or Python might be not enough. You may have to implement a special version for this task.

Input

Two space-separated floating numbers a, b (0 < a, b ≤ 10⁹). Exactly 9 digits are kept after the decimal point.

Output

Print the answer with absolute or relative error not greater than 10^- 15.

ExamplesInput

3.000000000 2.000000000

Output

1.000000000

Input

0.400000000 0.200000000

Output

2018 ECNU Campus Invitational Contest

405217: GYM101848 A Modulo

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