4 隻青蛙
[jonathan@c2q-q9400 ~]$ perl math02.pl 4 It should move [24] steps! 0: [1111-0000] 1: [111-10000] 2: [11101-000] 3: [111010-00] 4: [1110-0100] 5: [11-010100] 6: [1-1010100] 7: [101-10100] 8: [10101-100] 9: [1010101-0] 10: [10101010-] 11: [101010-01] 12: [1010-0101] 13: [10-010101] 14: [-01010101] 15: [0-1010101] 16: [001-10101] 17: [00101-101] 18: [0010101-1] 19: [001010-11] 20: [0010-0111] 21: [00-010111] 22: [000-10111] 23: [00001-111] 24: [0000-1111]