#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
#include<bitset>
#include<cassert>
#include<complex>
#include<fstream>
using namespace std;
typedef long long ll;
const int mod=998244353;
const int dx[]={1,0,0,-1},dy[]={0,1,-1,0};
int main(){
	int n;
	cin>>n;
	string s="0";
	map<int,int>mp;
	for(int i=1;;i++){
		if(mp[i]==9)
			break;
		char c='1'+mp[i];
		if(s.back()==c)
			c++;
		cout<<c;
		s+=c;
		for(int j=1;j<i;j++)
			if(s[j]==s[i])
				mp[i+j]=max(mp[i+j],c-'0');
		if(i==n)
			break;
	}
	cout<<endl;
}