Count Sequences With Product X Problem Statement

You are provided with an array NUM containing N positive integers. Your objective is to find the total number of possible sequences of positive integers (greater than 1) whose product equals X.

Explanation:

The value of X is computed as the product of N terms, where each ith term is represented by the ith prime number raised to the power of the ith element in the given array.

In mathematical terms, X can be expressed as:

X = 2 ^ NUM[1] * 3 ^ NUM[2] * 5 ^ NUM[3] * 7 ^ NUM[4] * 11 ^ NUM[5] * … up to Nth term

Input:

The first line of input contains an integer T, representing the number of test cases.
Then, T test cases follow.
Each test case begins with a line containing a single integer N, the size of the array NUM.
The subsequent line contains N space-separated integers, the elements of NUM.

Output:

For each test case, output a single integer on a new line representing the total number of possible sequences of positive integers (greater than 1) whose product equals X. 

Example:

Input: 
2
3
1 2 1
2
1 1
Output: 
6
3

Constraints:

  • The sum of all elements in array NUM will always be ≤ 400.
  • The answer should be printed modulo 1000000007, due to potentially large sizes.
  • 1 ≤ T ≤ 10
  • 2 ≤ N ≤ 500
  • 1 ≤ NUM[i] < 100
  • Time Limit: 1 second

Note:

You are not required to print anything explicitly. Simply implement the desired function, and it will handle the output.

AnswerBot
4mo

Count the total number of possible sequences of positive integers whose product equals X.

  • Calculate the product X using the given formula

  • Find all the divisors of X

  • Count the number of sequences with pro...read more

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