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Description

Write a short C++ program which displays a menu for the user to choose between converting US dollars into Chinese RMB and Chinese RMB into US dollars. The user inputs the amount and the precision, then the program display the corresponding result.

Note: use 1.00 USD = 6.20350 CNY as the exchange rate

Format

Files

You should submit a tar file containing a c++ source file ex2.cpp

Input

three lines, the first one being 1 for USD or 2 for CNY, the amount on the second one, and
the precision on the third one

Output

one line showing the result of the conversion

Sample 1

Input

1
100
6

Output

620.350

Limitation

1s, 32MiB for each test case.