你从一个连续整数序列开始，想要将它们分组到不同的集合中。
给定一个区间 $[A, B]$ 和一个整数 $P$。最初，区间中的每个数字都各自属于一个集合。
接着，考虑区间内的每一对整数。如果这两个整数共享一个至少为 $P$ 的质因数，则将这两个整数所属的集合合并。
请问在这一过程结束时，总共有多少个不同的集合？
样例
输入格式 1
2 10 20 5 10 20 3
输出格式 1
Case #1: 9 Case #2: 7
QOJ.ac
QOJ
حد الوقت: 10 s
حد الذاكرة: 1024 MB
مجموع النقاط: 25
#5758. 数字集合
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