#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1000005;

int n;
vector <pair <int,int> > G[2005];
vector <pair <int,int> > li[2005][55],ans[55];
int lisy[2005],lc = 0;

void solve(){
    cin >> n;
    int mx = 0;
    for(int i = 1;i <= n;i ++){
        int x,y,a; cin >> x >> y >> a;
        G[y + 1000].push_back(make_pair(x,a));
        lisy[++ lc] = y;
        mx = max(mx,a);
    }
    sort(lisy + 1,lisy + 1 + lc);
    lc = unique(lisy + 1,lisy + 1 + lc) - lisy - 1;
    for(int y = -1000;y <= 1000;y ++){
        if(G[y + 1000].size() == 0) continue;
        G[y + 1000].push_back(make_pair(-1001,mx)); G[y + 1000].push_back(make_pair(1001,mx));
        sort(G[y + 1000].begin(),G[y + 1000].end());
        int base_y = y * 60,lx = -1000000000 + 200000 * (1000 + 100);
        if(y <= 0) base_y -= 100;
        else base_y += 100;
        for(int a = 1;a <= mx;a ++){
            li[y + 1000][a].push_back(make_pair(-1000 - a,y));
            li[y + 1000][a].push_back(make_pair(lx - 200000 * (1000 + a) + 1,base_y + a));
            G[y + 1000].back().first = 1000 + a;
            for(int j = 1;j < G[y + 1000].size();j ++){
                if(G[y + 1000][j].second >= a){
                    int curx = G[y + 1000][j].first;

                    if(li[y + 1000][a].back().first != lx + 200000 * curx - 1) li[y + 1000][a].push_back(make_pair(lx + 200000 * curx - 1,base_y + a));
                    li[y + 1000][a].push_back(make_pair(curx,y));
                    if(j + 1 != G[y + 1000].size()) li[y + 1000][a].push_back(make_pair(lx + 200000 * curx + 1,base_y + a));
                }
            }
        }
    }
    for(int i = 1;i <= lc;i ++){
        int y = lisy[i];
        int base_y = y * 60,rx = 1000000000;
        if(y <= 0) base_y -= 100;
        else base_y += 100;
        for(int a = 1;a <= mx;a ++){
            for(auto pi : li[y + 1000][a]) ans[a].push_back(pi);
            ans[a].push_back(make_pair(rx - a,base_y + a - 1));
            ans[a].push_back(make_pair(rx - a,base_y + 50));
        }
    }
    cout << mx << '\n';
    int sumsiz = 0;
    map <pair <int,int>,int> mp;
    for(int i = 1;i <= mx;i ++){
        cout << ans[i].size();
        sumsiz += ans[i].size();
        for(auto [x,y] : ans[i]){ cout << ' ' << x << ' ' << y; mp[make_pair(x,y)] ++; }
        cout << '\n';
    }
    // for(auto it = mp.begin();it != mp.end();it ++){
    //     cout << (it->first).first << ' ' << (it->first).second << ' ' << it->second << endl;
    // }
    assert(sumsiz <= 10000);
}

int main(){
    ios::sync_with_stdio(false);
    solve();
    return 0;
}