HBC237152牛妹的苹果树,最近公共祖先（LCA）,图论,动态规划,树形dpThis is a number theory problem题解

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PaiGuDragon is an excellent number theory player. For apositive interger number xxx, if the digit sum of xxx is a prime number, the PaiGuDragon calls xxx nice number.(i.e. digit sum of 269 equals to 17, and 17 is a prime number so 269 is nice!) PaiGuDragon is curious about what is the nnn th smallest nice number.

PaiGuDragon is an excellent number theory player. For a positive interger number xxx, if the digit sum of xxx is a prime number, the PaiGuDragon calls xxx nice number.(i.e. digit sum of 269 equals to 17, and 17 is a prime number so 269 is nice!) PaiGuDragon is curious about what is the nnn th smallest nice number.

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标签： HBC237152牛妹的苹果树 最近公共祖先（LCA） 图论 动态规划 树形dpThis is a number theory problem题解