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Graph Theory
medium
0:00.0
What is the vertex cover number of
K
n
K_n
K
n
?
A
n
n
n
B
n
−
1
n-1
n
−
1
C
⌈
n
÷
2
⌉
\lceil n \div 2 \rceil
⌈
n
÷
2
⌉
D
1
1
1
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