#include <bits/stdc++.h>
using namespace std;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(0);
  int m = 3;
  cout << m << '\n';
  cout << 7 << " " << 8 << '\n';
  cout << 100 << " " << 9 << '\n';
  cout << 50 << " " << 12 << '\n';
  return 0;
}