2 R 2 R O y x Begin P = 5/4 - R x = & y = P8P(x, y, c) Yes P < 0 Yes P = P + 2x + 3 No P = P + 2(x - y) + 5 y = y - 1 x = x + 1 P8P(x, y, c) End No )2/(Rroundx < 2/R 2/R