You are given an array of integers. Determine if you can split the array into two non-empty subarrays such that the products of the numbers in each subarray are coprime (no common factors other than 1).

Calculate all possible subsequence sums from a given array of numbers. Return the bitwise OR of all those sums.

Imagine a long corridor with plants and seats. Find the number of ways to divide the corridor into sections, ensuring each section has exactly two plants.