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

using ll = long long;
const ll mod=998244353;
using vll =vector<ll>;
using vvll =vector<vll>;
#define rep(i,n) for(int i=0;i<n;i++)




int main(){
    vector<pair<ll,ll>> P;
    P.push_back({-1e9,-1e9});
    P.push_back({-1e9+1,-1e9});
    while(1){
        ll dy=P[P.size()-1].second-P[P.size()-2].second;
        ll ny=P[P.size()-1].second+dy+1;
        if(ny>1e9)break;
        P.push_back({P.back().first+1,ny});
    }
    cout<<P.size()<<endl;
    rep(i,P.size())cout<<P[i].first<<" "<<P[i].second<<endl;
}