Commander Lambda is all about efficiency, including using her bunny prisoners for manual labor. But no one's been properly monitoring the labor shifts for a while, and they've gotten quite mixed up. You've been given the task of fixing them, but after you wrote up new shifts, you realized that some prisoners had been transferred to a different block and aren't available for their assigned shifts. And manually sorting through each shift list to compare against prisoner block lists will take forever - remember, Commander Lambda loves efficiency!
Given two almost identical lists of prisoner IDs x and y where one of the lists contains an additional ID, write a function answer(x, y) that compares the lists and returns the additional ID.
For example, given the lists x = [13, 5, 6, 2, 5] and y = [5, 2, 5, 13], the function answer(x, y) would return 6 because the list x contains the integer 6 and the list y doesn't. Given the lists x = [14, 27, 1, 4, 2, 50, 3, 1] and y = [2, 4, -4, 3, 1, 1, 14, 27, 50], the function answer(x, y) would return -4 because the list y contains the integer -4 and the list x doesn't.
In each test case, the lists x and y will always contain n non-unique integers where n is at least 1 but never more than 99, and one of the lists will contain an additional unique integer which should be returned by the function. The same n non-unique integers will be present on both lists, but they might appear in a different order, like in the examples above. Commander Lambda likes to keep her numbers short, so every prisoner ID will be between -1000 and 1000.
To provide a Python solution, edit solution.py
To provide a Java solution, edit solution.java
Inputs:
(int list) x = [13, 5, 6, 2, 5]
(int list) y = [5, 2, 5, 13]
Output:
(int) 6
Inputs:
(int list) x = [14, 27, 1, 4, 2, 50, 3, 1]
(int list) y = [2, 4, -4, 3, 1, 1, 14, 27, 50]
Output:
(int) -4
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