设计要求：模拟上述舞伴系统，并能计算对于任何男士a和女士B在哪一轮舞曲中的k次跳舞？

Design requirements: Analog the partner system, and can calculate for any men 's a and women dance in B in which a k-dance?

youdao

为了好好改变花样，乐队在演奏一轮伦巴舞和恰恰舞曲之后，换了狐步舞曲。

After a round of rumbas and cha-chas the band, for a nice change of pace, played a fox trot.

youdao

为了好好改变花样，乐队在演奏一轮伦巴舞和恰恰舞曲之后，换了狐步舞曲。

After a round of rumbas and cha-chas the band, for a nice change of pace, played a fox trot.

youdao