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The number of edges in the "continguous USA graph" whose 49 vertices represent the contiguous 48 states of the United States plus the District of Columbia (DC) and whose edges connect pairs states (plus DC) which are connected by at least one drivable road. [Post]

Submitted: 2010-01-22 12:06:36;   Last Modified: 2010-01-22 14:24:01.
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