You are given two arrays, nums1 and nums2, each consisting of non-negative integers. You need to calculate the XOR of all possible pairings between the integers in nums1 and nums2. The result should be the XOR of all the numbers from this new array formed by XORing every integer in nums1 with every integer in nums2.
You are given a 0-indexed integer array nums. A number x is expressible from nums if there exists a subsequence of elements in nums whose bitwise OR equals x. Your task is to return the smallest positive integer that cannot be expressed as the bitwise OR of any subsequence from nums.
A number of robots are standing on an infinite number line with their initial positions given in the array nums. Each robot will move based on a command string s where ‘L’ means left and ‘R’ means right. If two robots collide, they instantly reverse their directions. Your task is to calculate the sum of the distances between all pairs of robots d seconds after the command.