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  • 空军 6推荐

    488. 失衡尼姆

    题目 [Problem 488: Unbalanced Nim][1] Alice and Bob have enjoyed playing Nim every day. However, they finally got bored of playing ordinar…...

  • 空军 6推荐

    487. 幂和之和

    题目 [Problem 487: Sums of power sums][1] Let fk(n) be the sum of the kth powers of the first n positive integers. For example, f2(10) = …...

  • 空军 5推荐

    480. 最后的问题

    题目 [Problem 480: The Last Question][1] Consider all the words which can be formed by selecting letters, in any order, from the phrase: …...

  • 空军 9推荐

    473. 斐基数

    题目 [Problem 473: Phigital number base][1] Let φ be the golden ratio: φ ![][2]. Remarkably it is possible to write every positive intege…...