CF992D.Nastya and a Game

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时间限制:2.00s

内存限制:256MB

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题目描述

Nastya received one more array on her birthday, this array can be used to play a traditional Byteland game on it. However, to play the game the players should first select such a subsegment of the array that , where p is the product of all integers on the given array, s is their sum, and k is a given constant for all subsegments.

Nastya wonders how many subsegments of the array fit the described conditions. A subsegment of an array is several consecutive integers of the array.

娜斯佳生日时又收到了一个数组,这个数组可用于在拜特兰德(Byteland)传统游戏中进行操作。然而,要进行游戏,玩家首先需要选择该数组的一个子段,使得满足条件:,其中 pp 是该子段中所有整数的乘积,ss 是它们的和,而 kk 是对所有子段给定的常数。

娜斯佳想知道,该数组中有多少个子段满足上述条件。数组的一个子段是指数组中若干连续的整数。

输入格式

The first line contains two integers n and k (1 ≤ n ≤ 2·105, 1 ≤ k ≤ 105), where n is the length of the array and k is the constant described above.

The second line contains n integers _a_1, _a_2, ..., a__n (1 ≤ a__i ≤ 108) — the elements of the array.

第一行包含两个整数 nn 和 kk(1≤n≤2⋅1051 \leq n \leq 2 \cdot 10^5,1≤k≤1051 \leq k \leq 10^5),其中 nn 表示数组的长度,kk 是上述描述的常数。

第二行包含 nn 个整数 a1, a2, …, ana_1,\ a_2,\ \dots,\ a_n(1≤ai≤1081 \leq a_i \leq 10^8)—— 数组的元素。

输出格式

In the only line print the number of subsegments such that the ratio between the product and the sum on them is equal to k.

在唯一的一行中输出满足其上乘积与和的比值等于 kk 的子段数量。

输入输出样例

  • 输入#1

    1 1
    1

    输出#1

    1
  • 输入#2

    4 2
    6 3 8 1

    输出#2

    2

说明/提示

In the first example the only subsegment is [1]. The sum equals 1, the product equals 1, so it suits us because .

There are two suitable subsegments in the second example — [6, 3] and [3, 8, 1]. Subsegment [6, 3] has sum 9 and product 18, so it suits us because . Subsegment [3, 8, 1] has sum 12 and product 24, so it suits us because .

在第一个例子中,唯一的子段是 [1]。其和为 1,积为 1,因此满足条件,因为 。

在第二个例子中有两个满足条件的子段:[6, 3] 和 [3, 8, 1]。子段 [6, 3] 的和为 9,积为 18,因此满足条件,因为 。子段 [3, 8, 1] 的和为 12,积为 24,因此满足条件,因为 。

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