- A5-2 超级素数的个数
-
202507cj09盛歆宜 (盛歆宜) LV 6 @ 2025-07-25 12:16:38
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,cnt,ans=0;
cin>>n;
for(int j=1;j<=n;j++)
{
int jt=j;
while(jt!=0)
{
cnt=0;
for(int i=1;i<=jt;i++)
{
if(jt%i==0)
cnt++;
}
if(cnt==2)
jt=jt/10;
else
break;
}
if(jt==0)
ans++;
}
cout<<ans;
return 0;
}
2 条评论
-
202507zj22张子瑞 (张子瑞) LV 9 @ 2025-07-29 19:02:46
#include<bits/stdc++.h>
using namespace std;
int main( )
{
int n,f,cnt=0;
cin>>n;
for(int i=2;i<=n;i++)
{
int n=i;
while(n>0)
{
f=1;
for(int j=2;j*j<=n;j++)
if(n%j==0)
{
f=0;
break;
}
if(f==0||n==1)break;//判断是否为1、2
n/=10;//去尾
}
if(n==0)cnt++;
}
cout<<cnt<<endl;
return 0;
} -
@ 2025-07-26 09:56:33
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- 1
信息
- ID
- 1061
- 难度
- 4
- 分类
- (无)
- 标签
- 递交数
- 276
- 已通过
- 120
- 通过率
- 43%
- 上传者
-
金老师 (zfkin)
