PUMaC 2018 · 团队赛 · 第 10 题

PUMaC 2018 — Team Round — Problem 10

For how many ordered quadruplets ( a, b, c, d ) of positive integers such that 2 ≤ a ≤ b ≤ c and 1 ≤ d ≤ 418 do we have that bcd + abd + acd = abc + abcd ? a

解析

暂无解答链接。

No solutions link available.