#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  vector<tuple<int, int, int>> ans;
  for (int x = 0; x <= N; x++){
    for (int y = 0; x * y <= N && y <= N; y++){
      if (!(x + y == 0)){
        if ((N - x * y) % (x + y) == 0){
          int z = (N - x * y) / (x + y);
          ans.push_back(make_tuple(x, y, z));
        }
      }
    }
  }
  int T = ans.size();
  cout << T << endl;
  for (int i = 0; i < T; i++){
    cout << get<0>(ans[i]) << ' ' << get<1>(ans[i]) << ' ' << get<2>(ans[i]) << endl;
  }
}