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Points: 200.00 (partial)
Time limit: 1.0s
Memory limit: 1G
Input: stdin
Output: stdout

Author:
Problem type
Allowed languages
C, C++, GAS64, Pascal, Perl, PHP, Python, Sed, TCL, Text

Ví dụ:
INPUT
3 3
1 2 1
10 10 2
OUTPUT
62

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