#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second

const ll MOD = 1000000007;
const ll MOD2 = 998244353;
const ll INF = 1LL << 60;
const ll MAX_N = 2e5;

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    ll n; cin >> n;
    ll a=1, b=2, c=1;
    for(ll i=1; i<n; i++){
        b++;
        if(b==10){
            a++;
            if(a==9){
                c++;
                a=1;
            }
            b=a+1;
        }
    }

    cout << a;
    for(ll i=0; i<c; i++) cout << b;
    cout << endl;
}