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Points: 200.00 (partial)
Time limit: 1.0s
Memory limit: 1G
Input: stdin
Output: stdout
Author:
kieulqd
Problem type
Allowed languages
C, C++, GAS64, Pascal, Perl, PHP, Python, Sed, TCL, Text

Ví dụ
Input
3
6 9
1 1
1 2
Ouput
YES
NO
YES

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