You're given a graph; your goal is to add edges to it so that every node has an even degree. Find the minimum number of edges to add to achieve this.

Given an integer, you need to express it as the sum of two positive integers, neither of which contains the digit zero. Find and return any such pair of no-zero integers.

Determine if a pattern of a certain length repeats itself consecutively in an array at least a given number of times. Specifically, check for repeating subarrays.