#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()

int main(){
    int N;
    cin >> N;

    vector<pair<int,int>> p;
    for(int a = 1; a <= 9; ++a){
        for(int b = a+1; b <= 9; ++b){
            p.push_back({a, b});
        }
    }

    if(N % 36 == 0){
        int cnt = N/36;
        cout << p.back().first << p.back().second;
        rep(i, 0, cnt-1) cout << p.back().second;
        cout << endl;
    }else{
        int i = N % 36 - 1, cnt = N/36;
        cout << p[i].first << p[i].second;
        rep(i, 0, cnt) cout << p[i].second;
        cout << endl;
    }
    return 0;
}