import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int[] arr = new int[n];
        for (int i = 1; i < n; i++) {
            arr[i] += i - 1;
            for (int j = 1; j * i < n; j++) {
                arr[i * j]--;
            }
        }
        ArrayList<Integer> mins = new ArrayList<>();
        int min = Integer.MAX_VALUE;
        for (int i = 1; i < n; i++) {
            int x = Math.abs(arr[i] - arr[n - i]);
            if (min == x) {
                mins.add(i);
            } else if (min > x) {
                min = x;
                mins.clear();
                mins.add(i);
            }
        }
        StringBuilder sb = new StringBuilder();
        for (int x : mins) {
            sb.append(x).append(" ").append(n - x).append("\n");
        }
        System.out.print(sb);
    }
}