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%%%。
%什么,我这么蒟蒻。
反膜%%%
%%%我都没碰过紫题
我紫题打表A的。
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P4708 是吧
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int a[]={0,1,1,2,3,7,16,54,243,2038,33120,1182004,87723296,907260828, 445874017, 131059413,750854059,85710140,46269468,106575268,569924828,477980796,853121491, 916490672,848722293,179336057,577163661,709912061,916083428,988859367,286999618, 29547862,713350279,194424628,553076032,609634772,876525030,182311698,148716617, 346128108,650982654,373128192,361260409,524419271,834718796,514750301,478609700, 386216865,881562716,715225681,602577017};
水黑++
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我用题解里的代码跑的,但我不敢交。
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