package chelper;

import java.util.ArrayList;
import java.util.List;

import io.InputReader;
import io.OutputWriter;
import misc.SimpleSavingChelperSolution;


public class C extends SimpleSavingChelperSolution {

  public void solve(int testNumber, InputReader in, OutputWriter out) {
    wrapSolve(testNumber, in, out);
  }

  int sum(int x) {
    int res = 0;

    while (x > 0) {
      res += x % 10;
      x /= 10;
    }

    return res;
  }

  @Override
  public void solve(int testNumber) {
    int n = in.nextInt();

    List<Integer> ans = new ArrayList<>();
    for (int i = Math.max(0, n - 1000); i < n; i++) {
      if (i + sum(i) == n) {
        ans.add(i);
      }
    }

    out.println(ans.size());
    for (int i : ans) {
      out.println(i);
    }
  }
}