摘要：
简单的求欧拉函数的值，留下来做个模板。。。。。。。。。。题目：Given n, a positive integer, how many positive integers less than n are relatively prime to n? Two integers a and b are relatively prime if there are no integers x > 1, y > 0, z > 0 such that a = xy and b = xz.InputThere are several test cases. For each test c 阅读全文
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