ICPC 2021 miền Bắc - Bài M: Graph

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Points: 1.50
Time limit: 1.0s
Memory limit: 256M
Input: stdin
Output: stdout

Problem source:
ICPC 2021 miền Bắc
Problem type
Allowed languages
C, C++, Java, Kotlin, Pascal, PyPy, Python, Scratch

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