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GATE | GATE-CS-2014-(Set-1) | Question 65

Consider an undirected graph G where self-loops are not allowed. The vertex set of G is {(i, j): 1 <= i <= 12, 1 <= j <= 12}. There is an edge between (a, b) and (c, d) if |a − c| <= 1 and |b − d| <= 1. The number of edges in this graph is __________.

(A)

500

(B)

502

(C)

506

(D)

510

Answer

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