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#T1151. 素数个数
ID: 646
Type: Default
1000ms
128MiB
Tried: 9
Accepted: 4
Difficulty: 9
Uploaded By:
Csvoner
素数个数
题目描述
编程求2~n(n为大于2的正整数)中有多少个素数。
输入
输入n(2≤n≤50000)。
输出
素数个数。
样例
10
4
来源
一本通在线评测
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