39 lines
452 B
C++
39 lines
452 B
C++
#include<cstdio>
|
|
using namespace std;
|
|
int fan(int n)
|
|
{
|
|
int ans=0;
|
|
do
|
|
{
|
|
ans=ans*10+n%10;
|
|
n/=10;
|
|
}
|
|
while(n);
|
|
return ans;
|
|
}
|
|
bool isp(int n)
|
|
{
|
|
if(n<=1) return 0;
|
|
for(int i=2;i*i<=n;i++) if(n%i==0) return 0;
|
|
return 1;
|
|
}
|
|
int main()
|
|
{
|
|
bool f=0;
|
|
int a,b;
|
|
scanf("%d%d",&a,&b);
|
|
for(int i=a;i<=b;i++)
|
|
{
|
|
if(isp(i)&&isp(fan(i)))
|
|
{
|
|
if(f) printf(",");
|
|
else f=1;
|
|
printf("%d",i);
|
|
}
|
|
}
|
|
if(!f) printf("No");
|
|
printf("\n");
|
|
return 0;
|
|
}
|
|
|