#759. Pairs with product k
Count the pairs with i < j and a[i] · a[j] = k.
### Input
The first line has n, the second line has n integers separated by spaces. The third line has k.
### Output
A number.
Examples
Input
7 11 10 6 9 1 5 7 10
Output
1
Input
9 3 11 5 2 8 2 3 5 7 2
Output
0
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.