+1 vote
119 views

| 119 views
0
8 vertices
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no .
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4 * 35*2 ?

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wrong
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Is 48 solution?
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0
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how? can you explain?
+6

The inner complete graph k4 need 4 color and we can color these vertices in $4! = 24$ ways.
for outer rectangle we have 9 choices. so total $24*9 = 216$ ways we can color this graph.

+1 vote