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Educational Codeforces Round 86 (Rated for Div. 2) C. Yet Another Counting Problem
时间 2020-07-21
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C. Yet Another Counting Problemc++ 题意:给两个数a、b, 再给 q 个范围 l、r,问在 l~r 的范围中有多少个数x是 x % a % b != x % b % a ,输出符合条件的数的个数web 思路:一个连续区间去模同一个数是周期性的,好比1~10 去%3 获得的结果就是 1 2 0 1 2 0 1 2 0 1svg 因此题面给的a、b一样具备这样的周期性
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