#include <iostream>
#include <vector>
#include <algorithm>
#define rep(i, l, n) for (int i = (l); i < (n); i++)
#define all(x) x.begin(), x.end()
using namespace std;
template <class T>
using V = vector<T>;


int gcd(int a, int b) {
	a = abs(a);	b = abs(b);
	while (b != 0) {
		int r = a % b;
		a = b;
		b = r;
	}
	return a;
}

int area(const V<int>& v1, const V<int>& v2) {
	int x1 = v1[0], y1 = v1[1];
	int x2 = v2[0], y2 = v2[1];
	return (x1 * y2 - x2 * y1);
}

bool arg_sort(const V<int>& v1, const V<int>& v2) {
	return area(v1, v2) > 0;
}


int main(void) {
	V<V<int> > vec = { {1,0} };
	int n = 1000, m = 50000;
	for (int i = 1; i < n; ++i) {
		for (int j = 1; j < n; ++j) {
			if (gcd(j, i) > 1) {
				continue;
			}
			vec.push_back({ j,i });
			vec.push_back({ j,-i });
		}
	}

	int N = vec.size();
	if (N > m) {
		vec.resize(m);
		N = m;
	}
	sort(all(vec), arg_sort);

	int M = 1000000000;
	int x = -M, y = 0;
	cout << (N * 2) << endl;
	// return 0;

	for (V<int> v : vec) {
		x += v[0];	y += v[1];
		cout << x << ' ' << y << endl;
	}
	for (V<int> v : vec) {
		x -= v[0];	y -= v[1];
		cout << x << ' ' << y << endl;
	}

	return 0;
}