I send program with such procedure:

void moveNorth(double dist)
{
  w += dist / rEarth * 180 / pi;
  if (w > 91.0)
    n = (n - n) / n;
}

And got crash 15, but when i send

void moveNorth(double dist)
{
  w += dist / rEarth * 180 / pi;
}

i got accepted.

So, i think device can reach north pole with test 15 input data, but it's impossible.

In this test the device flies too close to north pole.
I got AC instead WA#15 when I changed PI from 3.14159265 to 3.141592653589.
And I searched for a numerical mistake for 1 hour :) Ha-ha!

Edited by author 03.03.2011 23:16