Group 2016 research and development engineer Pen test (tie shoelace problem)

Source: Internet
Author: User

From A to B, there is an escalator in the middle, the total distance and the length of the escalator is fixed, in order to catch up the whole journey in the walk (including the escalator), halfway found that the shoelace loose, need to stop to tie the laces. Please tell me how to tie the laces on the escalator.

  1. Tie your shoelaces on the road for a short journey
  2. The escalator is tied with laces, the whole time is short
  3. Same time
  4. And the length of the escalator, tied laces specific time about

The answer is (2)

Solution steps:

Group 2016 research and development engineer Pen test (tie shoelace problem)

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