#include <iostream>
#include <vector>
#include <atcoder/all>

#define ALL(V) std::begin(V), std::end(V)

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

    int len = (N - 1) / 36 + 1;
    int rem = (N - 1) % 36;
    int a = 1, b = 2;
    for (int i = 1; i <= rem; i++) {
        if (b == 9) {
            a++;
            b = a + 1;
        } else {
            b++;
        }
    }
    std::cout << a;
    while (len--) std::cout << b;
    std::cout << std::endl;
    return 0;
}