#include <bits/stdc++.h>


using namespace std;


using ll = long long;

#define rep(i, n) for(int i = 0; i < (n); i += 1)
#define rng(i, start, end, step) for(int i = start; i < end; i += step)
#define len(a) ((int)(a).size())


mt19937 rnd(234);


int32_t main() {
    if (1) {
        ios::sync_with_stdio(0);
        cin.tie(0);
        cout.tie(0);
    }
    int n;
    cin >> n;
    vector<array<int, 3>> a(n);
    rep(i, n) rep(j, 3) cin >> a[i][j];
    int mx = 0;
    rep(i, n) mx = max(mx, a[i][2]);
    a.push_back(array<int, 3>{-1001, -1001, mx});
    a.push_back(array<int, 3>{1001, 1001, mx});
    n += 2;
    sort(a.begin(), a.end(), [&](array<int, 3> a, array<int, 3> b) {
        return a[0] * 2 + 10001 * a[1] < b[0] * 2 + 10001 * b[1];
        });
    vector<array<int, 2>> d(n - 1);
    rep(i, n - 1) d[i] = { a[i][0] - 5000, a[i][1] + 1 };
    vector<vector<array<int, 2>>> lines(mx);
    rep(itr, mx) {
        rep(i, n) {
            if (a[i][2] > 0) {
                lines[itr].push_back({ a[i][0], a[i][1] });
                a[i][2] -= 1;
            }
            if (i == n - 1) break;
            lines[itr].push_back({ d[i][0], d[i][1] });
            d[i][0] -= 10001;
            d[i][1] += 2;
        }
    }
    cout << mx << "\n";
    for (auto line : lines) {
        cout << len(line);
        for (auto [x, y] : line) {
            cout << " " << x << " " << y;
        }
        cout << "\n";
    }
    return 0;
}