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Nabu's Knee-knockerNabu's Knee-knocker

This is the map of a neighborhood where all the streets are east-west or north-south. The taxi-distance between two intersections in this neighborhood is the length (measured in blocks) of a shortest route between the two points. All routes must follow the streets like a taxi-cab would go. For example, the taxi-distance between points A and B is 5 blocks.

graph a


The Library in this neighborhood is at an intersection. Here are clues about the location of the Library (L).

Clues:
  • Taxi-distance from A to L + Taxi-distance from B to L = 7.
  • The Library is closer to A.
  • B is closer to the Library than to A.
  • When you are at A and go to the Library, you do not need to make any turns.
Can you locate the Library?


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