Hi guys.
Homework Statement
Given any two sequences of integers of length n, \left{\{a_k\right\}_{k=1}^n,\left{\{b_k\right\}_{k=1}^n,, where 1\le a_k,b_k\le n for all 1\le k\le n, show that there are subsequences of a_k,b_k such that the sum of the elements in each subsequence is equal...