@[璀璨天狼](/space/show?uid=144520) 0和1不是质数
by WA鸭鸭 @ 2018-12-09 18:20:59
第三行数组这样初始化只会把$vis[0]$设为$true$
by zhanghengrui @ 2018-12-09 18:44:28
要用`memset`或者循环
by zhanghengrui @ 2018-12-09 18:46:33
@[璀璨天狼](/space/show?uid=144520)
by zhanghengrui @ 2018-12-09 18:49:52
```
for(int j=i*i;j<=n;j++)vis[j]=false;
```
这一句有问题吧?
应该是:
```
for(int j=i*2;j<=n;j+=i) vis[j]=false;
```
by _RSY_ @ 2018-12-09 18:51:20
@[zhanghengrui](/space/show?uid=110634)
还是WA
by 御坂13558号 @ 2018-12-09 19:58:27