tijie

#include<iostream>
#include<cstring>
#include<algorithm>
using namespace std;
bool is_pal(int n){
    string s="";
    while(n!=0){
        s+=(char)(n%10+'0');
        n/=10;
    }
    string s1=s;
    reverse(s1.begin(),s1.end());
    return s1==s;
}
int main(){
    for(int i=1;i<=10000;i++){
        if(is_pal(i)) cout<<i<<" ";
    }
}