走了近路。N=100时,有8组解:
(5,95),
(11,89),
(17,83),
(23,77),
(29,71),
(35,65),
(41,59),
(47,53),
N=98时,也有8组解:
(1,97),
(7,91),
(13,85),
(19,79),
(25,73),
(31,67),
(37,61),
(43,55),
可是当N=96时,却有16解:
(1,95),
(5,91),
(7,89),
(11,85),
(13,83),
(17,79),
(19,77),
(23,73),
(25,71),
(29,67),
(31,65),
(35,61),
(37,59),
(41,55),
(43,53),
(47,49)。
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