题解

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,t,m=0;
	cin>>n;
	t=n;
	while(t!=0){
		m=m*10+t%10;
		t=t/10;
    }
	if(m!=n){
        cout<<"No";
        return 0;
    }
    for(int i=2;i<=sqrt(n);i++){
        if(n%i==0){
            cout<<"No";
            return 0;
        }
    }
    cout<<"Yes";
    return 0;
}