题解

#include <iostream>
using namespace std;
int main(){
	int n;
    cin>>n;
    for (int i = 1; i <= n; ++i) {
		int x = 0;
		int s = i; 
		while(s>0){
			x = x*10+s%10;   
			s = s/10;        
		}if(x==i){
			cout<<i<<endl;
		}
	}   
	return 0;
}