#include <bits/stdc++.h>

using namespace std;
ifstream f("be.in");
long long n,mb,ma,l;

struct Bencu {
    long long a;
    long long b;
}L[200010];

void torol (int i) {
    for (int j=i; j<l; j++) {
        L[j].a=L[j+1].a;
        L[j].b=L[j+1].b;
    }
    l--;
}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin>>n;
    int a,b;
    cin>>a>>b;
    ma=a;
    mb=b;
    L[1].a=a;
    L[1].b=b;
    l++;
    cout<<l<<endl;
    for (int t=1; t<=l; t++) cout<<"("<<L[t].a<<" "<<L[t].b<<")";
        cout<<endl;
    for (int z=2; z<=n; z++) {
        cin>>a>>b;
        //cout<<z<<":";
        if (a>=ma || b>=mb) {
            if (a>ma) ma=a;
            if (b>mb) mb=b;
            for (int i=1; i<=l; i++) {
                if (L[i].a<ma && L[i].b<b) {
                    torol(i);
                    i--;
                }
            }
            l++;
            L[l].a=a;
            L[l].b=b;
        }
        cout<<l<<"+"<<"("<<a<<" "<<b<<")"<<endl;
        for (int t=1; t<=l; t++) cout<<"("<<L[t].a<<" "<<L[t].b<<")";
        cout<<endl;
    }
    return 0;
}