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PUMaC 2024 · 团队赛 · 第 12 题

PUMaC 2024 — Team Round — Problem 12

专题
Discrete Math / 离散数学
难度
L3
来源
PUMaC

题目详情

  1. Find the number of positive integers 10 ≤ n ≤ 99 with last digit at most 5 such that the last n two digits of n are the same as n .
解析

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Original Explanation

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