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RGB7031 - Гурвалжны талбай

Гурвалжны гурван тал өгөгдсөн бол талбайг нь ол.

Input

Нэг мөрөнд зайгаар тусгаарлагдан гурвалжны 3 тал бодит тоогоор өгөгдөнө.

Output

Гурвалжны талбайг таслалаас хойш 2 орны нарийвчлалтай дүрсэл.

Example

Input:
3.0 4.0 5.0

Output:
6.00

Added by:Bataa
Date:2013-01-15
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:NCSHARP C++ 4.3.2 CPP CPP14 JULIA PYPY3

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