[HackerEarth] You are given an integer N. For each pair of integers (L, R), where 1 ≤ L ≤ R ≤ N you can find the number of distinct digits that appear in the decimal representation of at least one of - 题解

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题目信息
题号 P17742
标题 [HackerEarth] You are given an integer N. For each pair of integers (L, R), where 1 ≤ L ≤ R ≤ N you can find the number of distinct digits that appear in the decimal representation of at least one of
难度 普及
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