https://www.usamoguide.com/problems/hmmt-november-2018-hmmt-november-2018-0k33-discrete-mathematics-combinatorics-auto-3327
HMMT November 2018 #0k33 — HMMT November 2018 · USAMO Guide - Olympiad Mathematics Learning Platform
Free, comprehensive preparation platform for AMC 8, AMC 10/12, AIME, and USAMO with lessons, problem sets, mock exams, and full solutions.
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