#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (ll)(n); i++)
#define oke cout << "Yes" << '\n';
#define dame cout << "No" << '\n';
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
using HaiI = vector<vector<int>>;
using Hai2 = vector<vector<ll>>;
using HaiB = vector<vector<bool>>;
using Hai3 = vector<vector<vector<ll>>>;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout << fixed << setprecision(15);
	ll N;
	cin>>N;
	for(ll i=0;i<1e100;i++){
		string S;
		if(i!=0){
			 S=to_string(i);
		}else{
			S="";
		}
		string T=S;
		reverse(all(T));
		rep(j,10){
			string K=S+to_string(j)+T+"9";
			if(i==0 && j==0){
				continue;
			}
			ll A=stoll(K);
			if(A>=1e9 && A%N==0){
				cout<<A<<"\n";
				return 0;
			}
		}
	}
}