Discussion @ 1729. Dead Man's Chest @ Timus Online Judge

daftcoder [Yaroslavl SU] Hint [1] // Problem 1729. Dead Man's Chest 14 Nov 2009 11:23

For accuracy of calculations use power-reduction formulas /* 2 * sin ^ 2 (a) = 1 - cos(2a) */ in the formula that calculates chords long.

daftcoder [Yaroslavl SU] Re: Hint // Problem 1729. Dead Man's Chest 24 Nov 2009 01:51

2 * R * sin( a / 2 ) = sqrt ( 2 R R 2 sin^2 ( a / 2 ) ) = sqrt ( 2 R R ( 1 - cos ( a ) ) = sqrt ( 2 R R - 2 R R cos ( a ) ) = sqrt ( R^2 + R^2 + 2 * R * R * cos ( a ) )

Discussion of Problem 1729. Dead Man's Chest