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Points: 100.00 (partial)
Time limit: 1.0s
Memory limit: 1G
Input: stdin
Output: stdout
Author:
admin
Problem type
Allowed languages
C, C++, GAS64, Pascal, Perl, PHP, Python, Sed, TCL, Text

Ví dụ:
INPUT
5 4
3 5 7 9 10
3 4 9 11
OUTPUT
2

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