There are some points on Earth for which the following is true:

Starting from one of these points, you can walk 1 km South, then 1 km East, then 1 km North, and you will wind up back where you started from.

One such point is the North Pole. Where are others?

Dulanjana: don't forget to rate it then! I gave it a 4, and since the score is now 3.5 after two votes, there's someone who rated it a 3. You should definitely rate it what you think it's worth.

Given enough ratings, we will have a top rated problems section.

Posted by levik on 2002-05-29 06:45:54