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  1. Prepare
  2. Mathematics
  3. Geometry
  4. Polar Angles
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Polar Angles

  • delamath
     + 1 comment

    Crazy 2-liner in Python 3. :D

    from math import pi, atan2
print("\n".join(map("{} {}".format, *zip(*sorted((list(map(int,input().split())) for _ in range(int(input()))), key=lambda x: (atan2(x[1], x[0]) % (2 * pi), x[0] ** 2 + x[1] ** 2))))))