import java.io.*;
import java.util.*;


public class Main_yukicoder634 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		int[] tr = new int[n];
		Arrays.fill(tr, 3);

		List<Integer> trlist = new ArrayList<>();
		for (int i = 1; i * (i + 1) / 2 <= n; i++) {
			int tmp = i * (i + 1) / 2;
			tr[tmp - 1] = 1;
			trlist.add(tmp);
		}

//		pr.println(trlist.size());

		for (int i = 0, size = trlist.size(); i < size; i++) {
			for (int j = 0; j < size && trlist.get(i) + trlist.get(j) <= n; j++) {
				int tmp = trlist.get(i) + trlist.get(j);
				tr[tmp - 1] = Math.min(tr[tmp - 1], 2);
			}
		}

		pr.println(tr[n - 1]);
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(System.in);
		pr = new Printer(System.out);

		solve();

		pr.close();
		sc.close();
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}