CCCcccc0512 @ 2024-03-18 09:29:55
#include <stdio.h>
int zhi(int a)
{
int re=0;
for(int i=2;i<a;i++){
if(a%i==0){
re=1;
}
}
return re;
}
int hui(int a)
{
int n=a;
int intages=0,intall=0;
int re=1;
while(n!=0){
intages=n%10;
intall=intall*10+intages;
n/=10;
}
if(intall==a){
re=0;
}
return re;
}
int main()
{
int a,b;
scanf("%d%d",&a,&b);
for(int i=a;i<=b;i++){
if(zhi(i)==0){
if(hui(i)==0){
printf("%d\n",i);
}
}
}
return 0;
}by SHUYONGRUI @ 2024-04-06 10:58:37
#include<bits/stdc++.h>
using namespace std;
int Palindromes(int n){
if(n<10)return 1;
int nn=n,he=0;
while(nn){
he=he*10+nn%10;
nn/=10;
}
if(he==n)return 1;
else return 0;
}
int prime(int x){
for(int i=2;i<=sqrt(x);i++)if(x%i==0) return 0;
return 1;
}
int a,b;
int main(){
cin>>a>>b;
for(int i=a;i<=b;i++){
if(Palindromes(i) && prime(i)){
cout<<i<<endl;
}
}
return 0;
}