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RGB7105 - Нийлбэр 80

Өгөгдсөн 4 тооны 80-аас их тоонуудын нийлбэрийг ол.

Input

Нэг мөрөнд Int төрлийн 4 тоо зайгаар тусгаарлагдан өгөгдөнө.

Output

Нийлбэр.

Example

Input:
85 75 96 69
Output:
181
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Added by:Bataa
Date:2011-05-23
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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