49 i=3 2125 608 25 012345 4同园回同 0123 5 temp 5同 21 252549 b 012345 tem21 25 49 25* 16 08 0 1 2 3 4 5 0 1 2 3 4 5 temp 21 25 49 25* 16 i = 4 08 0 1 2 3 4 5 temp 21 25 49 16 25* 08 i = 5 i = 3 25* 16 08