既约分数
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Description
我们称p / q是既约分数，当p和q互质，即gcd(p，q) = 1。 请问有多少个既约分数的分母和分子都是1(包含)到2024(包含)范围 内的整数？
Format
Input
无
Output
直接输出答案以验证正确与否