这里是代码

#include <bits/stdc++.h>

using namespace std;

bool prime(int n) {
	if (n <= 1) return false;
	else {
		for (int i = 2; i * i <= n; i++) {
			if (n % i == 0) return false;
		}
		return true;
	}
}

int huiwen(int num) {
    int sum = 0;
    while(num > 0) {
        sum = sum * 10 + num % 10;
        num /= 10;
    }
    return sum;
}

int main() {
	int n, m;
	cin >> n >> m;
	for (int i = n; i <= m; i++) {
		if (prime(i) && huiwen(i) == i) cout << i << endl;
	}
	
	return 0;
}