// 

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

using ll = long long;

#define rep(i, n) for (int i=0; i<(int)(n); ++(i))
#define rep3(i, m, n) for (int i=(m); (i)<(int)(n); ++(i))
#define repr(i, n) for (int i=(int)(n)-1; (i)>=0; --(i))
#define rep3r(i, m, n) for (int i=(int)(n)-1; (i)>=(int)(m); --(i))
#define all(x) (x).begin(), (x).end()

const long double PI = acos(-1);
const int INF = (int)(1e9);

int main() {
	int n = (int)(1e5);
	vector<pair<int, int>> xy;
	const long double d = 2.0*PI / n;
	for (const pair<int, int> pi : vector<pair<int, int>>({ { INF, 0 }, { 0, INF }, { -INF, 0 }, { 0, -INF } })) {
		long double x = pi.first, y = pi.second;
		xy.emplace_back((int)(round(x)), (int)(round(y)));
		rep(i, n/4-1) {
			long double nx = cos(d) * x - sin(d) * y, ny = sin(d) * x + cos(d) * y;
			xy.emplace_back((int)(round(nx)), (int)(round(ny)));
			x = nx, y = ny;
		}
	}
	cout << n << endl;
	rep(i, n) cout << xy[i].first << ' ' << xy[i].second << endl;
	cout.flush();
	return 0;
}