#include "bits/stdc++.h"
using namespace std;
#define all(x) begin(x),end(x)
template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { string sep; for (const T &x : v) os << sep << x, sep = " "; return os; }
#define debug(a) cerr << "(" << #a << ": " << a << ")\n";
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int,int> pi;
const int mxN = 1e5+1, oo = 1e9;
int main() {
    int n; cin >> n;
    vector<array<int,3>> res;
    for(int x=0;x*x*3<=n;++x) {
        for(int y=x;x*y + y*y + x*y<=n;++y) {
            int num = n-(x*y);
            int denum = (x+y);
            if(num>=0 and denum!=0 and num%denum==0) {
                int z = num/denum;
                if(y<=z) {
                    array<int,3> arr = {x,y,z};
                    do {
                        res.push_back(arr);
                    } while(next_permutation(all(arr)));
                }

            }
        }
    }
    cout << res.size() << '\n';
    for(auto ans : res) {
        cout << ans << '\n';
    }
}