#include <bits/stdc++.h>

using namespace std;

//判断回文数
bool isHWS(int num) {
    int b = num, ans = 0;
    while (b) {
        ans = ans * 10 + b % 10;
        b /= 10;
    }
    return ans == num;
}

int main() {
    int a = 123321;
    if (isHWS(a))printf("是回文数！");
    else printf("不是回文数!");
    return 0;
}