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编程ACM的一道题There are several test cases.For each test case,sta

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编程ACM的一道题
There are several test cases.For each test case,standard input contains a line with n
编程ACM的一道题There are several test cases.For each test case,sta
There are several test cases.
多组测试数所
For each test case, standard input contains a line with n
再问: 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 case, standard input contains a line with n