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Description

读入一个双精度浮点数，保留12位小数，输出这个浮点数。

Format

Input

只有一行，一个双精度浮点数。

Output

也只有一行，保留12位小数的浮点数。

Samples

3.1415926535798932

3.141592653580

Limitation

1s, 64KiB for each test case.

python参考代码

# python的浮点数类型--float
n = input()
n = float(n)
print("%.12f" % (n))