QOJ.ac

QOJ

Limite de temps : 2.0 s Limite de mémoire : 512 MB Points totaux : 100 Hackable ✓

#7044. 简单问题

Statistiques

一个序列 $(a_1, a_2, \dots, a_n)$ 被称为 $(n, m, d)$-好的,如果满足 $1 \le a_i \le m$ ($1 \le i \le n$) 且 $\gcd(a_1, a_2, \dots, a_n) = d$。

给定四个整数 $n, m, d$ 和 $k$,请计算所有 $(n, m, d)$-好的序列 $q$ 的 $f(q, k)$ 之和,其中对于序列 $q = (a_1, a_2, \dots, a_n)$,有 $f((a_1, a_2, \dots, a_n), k) = (a_1 a_2 \dots a_n)^k$。

由于答案可能非常大,你只需要输出答案对 $59964251$ 取模的结果。

输入格式

第一行包含一个整数 $T$ ($1 \le T \le 20$),表示测试用例的数量。

对于每个测试用例,第一行包含四个整数 $n$ ($1 \le n \le 10^{100000}$),$m$ ($1 \le m \le 100000$),$d$ ($1 \le d \le 100000$),$k$ ($1 \le k \le 10^9$),其含义如题目描述所述。

输出格式

对于每个测试用例,输出一行,包含一个整数。

样例

样例输入 1

1
3 3 3 1

样例输出 1

27

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