#include <iostream> using namespace std; int main() { long long int n, a = 0, b = 0, c = 0; cin >> n; a = n; while (n != 0) { b = n % 10; c = c * 10 + b; n /= 10; } if (a == c) cout << a << "是一个回文数"; else cout << a << "不是一个回文数"; return 0; }