#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const ll goal = 5e17;

int N;
ll A[45], B[45];
int main(void){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    cin >> N;
    for(int i = 0;i < N;i++)cin >> A[i] >> B[i];
    ll mn = goal * 2;
    int mnpos = 0;
    for(int i = 0;i < N;i++){
        ll val = abs(goal - A[i]) + abs(goal - B[i]);
        if(mn > val){
            mn = val;
            mnpos = i;
        }
    }
    vector<pair<int, int>> ans;
    for(int i = 0;i < 50;i++){
        if(mnpos != 0){
            ans.push_back({1, mnpos + 1});
        }
    }
    cout << ans.size() << endl;
    for(auto [a, b] : ans){
        cout << a << " " << b << endl;
    }
    return 0;
}