import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        List<Answer> ans = new ArrayList<>();
        for (int i = 0; i * i <= n; i++) {
            for (int j = i; j * i <= n && j <= n; j++) {
                if (i == 0 && j == 0) {
                    continue;
                }
                if ((n - i * j) % (i + j) == 0) {
                    ans.add(new Answer((n - i * j) / (i + j), i, j));
                    if (i < j) {
                        ans.add(new Answer((n - i * j) / (i + j), j, i));
                    }
                } 
            }
        }
        System.out.println(ans.size());
        System.out.println(ans.stream().map(x -> x.toString()).collect(Collectors.joining("\n")));
    }
    
    static class Answer {
        int a;
        int b;
        int c;
        
        public Answer(int a, int b, int c) {
            this.a = a;
            this.b = b;
            this.c = c;
        }
        
        public String toString() {
            return a + " " + b + " " + c;
        }
    }
    
}
class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}