46 人解决，71 人已尝试。
59 份提交通过，共有 250 份提交。
4.8 EMB 奖励。
单点时限: 2.0 sec
内存限制: 256 MB
For given integer N (1<=N<=10^4) find amout of positive numbers not greater than N that coprime with N. Let us call two positive integers (say, A and B, for example) coprime if (and only if) their greatest common divisor is 1. (i.e. A and B are coprime iff gcd(A,B) = 1).
There are so many tests.Each line contains integer N.
Write answer in output file.
9
6
46 人解决，71 人已尝试。
59 份提交通过，共有 250 份提交。
4.8 EMB 奖励。
创建: 16 年，4 月前.
修改: 6 年，7 月前.
最后提交: 2 年，4 月前.
来源: N/A