题解

#include<iostream>
#include<algorithm>
using namespace std;
int n;
string s;
void f(int n){
    if(n==0){
        return;
    }
    f(n/8);
    s+=n%8;
}
int main(){
    cin>>n;
    f(n);
    string x=s;
    reverse(s.begin(),s.end());
    if(x==s){
        cout<<"YES";
    }else{
        cout<<"NO";
    }
    return 0;
}