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Yo'qolgan son | HackNow
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Yo'qolgan son
lock
UZ only
Oson
100 points
1 s
256 MB
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Author:
neo_yamaguchi
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Output format
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Examples
1
1
Example #1
Input
4 1 3 4 5
Output
2
Solution editor
Python 3
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PYTHON
UTF-8
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4 spaces
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