望丰展使md
by diqiuyi @ 2023-07-17 10:22:11
@[wenchuang](/user/1034912) 你这质数筛错了罢，为什么有一个 j 不是 a[i] 的因数就判定为质数啊
by diqiuyi @ 2023-07-17 10:23:50
谢谢大佬
by wenchuang @ 2023-07-17 11:17:50
```cpp
#include <iostream>
using namespace std;
int n,a[100005] = {1,1},q;
void f(int q){
for(int i = 2;i <= q;i++){
if(a[i] == 1){
continue;
}
for(int j = i * 2;j <= q;j += i){
a[j] = true;
}
}
}
int main(){
cin >> n;
f(100001);
for(int i = 1;i <= n;++i){
cin >> q;
if(!a[q] == 1){
cout << q << " ";
}
}
return 0;
}
```
by lucas_777 @ 2023-07-21 20:55:41