#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++)

ll sqrtz(ll N) {
    ll L = 0;
    ll R = sqrt(N)+10000;
    while (abs(R - L) > 1) {
        ll mid = (R +L) / 2;
        if (mid * mid <= N)L = mid;
        else R = mid;
    }
    return L;
    
}


int main(){
    vector<pair<ll,ll>> P;
    ll N=1e5/4;
    ll M=1e8;
    for(ll x=-M+1;x<0;x++){
        if(P.size()==N)break;
        ll y=-sqrtz(M*M-x*x);
        if(P.size()<2)P.push_back({x,y});
        else{
            auto d=P[P.size()-1];
            auto dd=P[P.size()-2];
            ll ddx=d.first-dd.first;
            ll ddy=-d.second+dd.second;
            ll dx=x-d.first;
            ll dy=-y+d.second;
            if(ddy*dx>dy*ddx){
                P.push_back({x,y});
            }
        }
    }

    N=P.size();
    for(ll n=N-1;n>=0;n--){
        P.push_back({-P[n].first,P[n].second});
    }

    N=P.size();

    for(ll n=N-1;n>=0;n--){
        P.push_back({P[n].first,-P[n].second});
    }

    cout<<P.size()<<endl;;
    rep(i,P.size())cout<<P[i].first<<" "<<P[i].second<<endl;
}