*******************************
*** The hack uses generator ***
*******************************

** Command line arguments **
no arguments

** Generated test **
10000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
500000000 1000000000000000000
50000000...

** Generator source **
#include<iostream>
#include<string>
#include<algorithm>
#include<functional>
#include<cmath>
#include<queue>
#include<vector>
#include<map>
#include<stack>
#include<list>
#include<deque>
#include<set>
#include<unordered_set>
#include<unordered_map>
#include<numeric>
#include<bitset>
#include<iomanip>


using namespace std;

#ifdef _DEBUG
#define prnt(a) cout<<#a<<"="<<a<<endl
#else
#define prnt(a) (void)0
#endif // _DEBUG

#define ll long long
#define ld long double
#define INF (1LL<<30)
#define INFLL (1LL<<60)
#define MOD 1000000007
#define MOD2 998244353
#define rep(i,st,en) for(int i=st;i<en;++i)
#define vld vector<ld>
#define vll	vector<ll>
#define vvll	vector<vll>
#define vi vector<int>
#define vvi vector<vi>
#define vb vector<bool>
#define vvb vector<vb>
#define pii	pair<int,int>
#define pll pair<ll,ll>
#define vpii vector<pii>
#define vpll vector<pll>
#define VS vector<string>
#define MY_PI           3.141592653589793238462643383279502884L
#define all(v) (v).begin(), (v).end()

#define rd(...) __VA_ARGS__; read(__VA_ARGS__)
#define rdv(value,...) value(__VA_ARGS__);cin >> value
template <class T> auto& operator>>(istream& is, vector<T>& xs) {
	for (auto& x : xs) is >> x;
	return is;
}
template <class T> auto& operator<<(ostream& os, vector<T>& xs) {
	int sz = xs.size();
	rep(i, 0, sz) os << xs[i] << " \n"[i + 1 == sz];
	return os;
}
template <class T, class Y> auto& operator<<(ostream& os, pair<T, Y>& xs) {
	os << "{" << xs.first << ", " << xs.second << "}";
	return os;
}
template <class T, class Y> auto& operator>>(istream& is, vector<pair<T, Y>>& xs) {
	for (auto& [x1, x2] : xs) is >> x1 >> x2;
	return is;

}
template <class  ...Args>
auto& read(Args & ...args) { return (cin >> ... >> args); }

#define write(...) writemy(__VA_ARGS__);cout<<"\n"
void writemy() {}
template <typename Head, class  ...Args>
void writemy(const Head& head, const Args & ...args) {
	cout << head << " ";
	writemy(args...);
}



class UnionFindTree {
public:
	vector<int> parent;
	vector<int> union_size;
	vector<ll> w;
	int len;
	ll value = 0;

	UnionFindTree(int n) {
		len = n;
		parent.resize(n + 1, 0);
		w.resize(n + 1, 0);
		union_size.resize(n + 1, 1);
		value = 0;
		rep(i, 0, n + 1) parent[i] = i;
	}

	int root(int a) {
		if (parent[a] == a)
			return a;
		parent[a] = root(parent[a]);
		return parent[a];
	}

	void setWeight(int a, ll we) {
		w[a] = we;
	}

	ll getWeight(int a) {
		int ra = root(a);
		return w[ra];
	}

	void join(int a, int b) {
		int ra = root(a);
		int rb = root(b);
		if (ra == rb)
			return;
		if (union_size[ra] > union_size[rb]) {
			parent[rb] = ra;
			union_size[ra] += union_size[rb];
			w[ra] += w[rb];
		}
		else {
			parent[ra] = rb;
			union_size[rb] += union_size[ra];
			w[rb] += w[ra];
		}
		len--;
	}

	int size(int a) {
		return union_size[root(a)];
	}

};

template <typename T>
class segmentTree {
public:
	vector<T> v;
	int n;
	T(*func)(T, T);
	T defval = 0;

	segmentTree(int s, T(*f)(T, T)) {
		n = 1;
		while (n < s) n *= 2;
		v.resize(2 * n, defval);
		func = f;
	}
	/// <summary>
	/// use this before calculateTree()
	/// index starts 0
	/// </summary>
	void setNode(int ind, T val) {
		v[ind + n - 1] = val;
	}

	ll calculateTree() {
		for (int i = n - 2; i >= 0; i--)
			v[i] = func(v[i * 2 + 1], v[i * 2 + 2]);
		return v[0];
	}
	/// <summary>
	/// add val to value[index]
	/// index starts 0
	/// </summary>
	void addValue(int ind, T val) {
		updateNode(ind, val + v[ind + n - 1]);
	}

	T getValue(int ind) {
		return v[ind + n - 1];
	}
	/// <summary>
	/// set value[ind] to val
	/// index starts 0
	/// </summary>
	void updateNode(int ind, T val) {
		v[ind + n - 1] = val;
		for (int i = (ind + n - 2) / 2; i != 0; i = (i - 1) / 2) {
			v[i] = func(v[i * 2 + 1], v[i * 2 + 2]);
		}
		v[0] = func(v[1], v[2]);
	}

	/// <summary>
	/// query sum of [l,r] from [st,en] range
	/// </summary>
	/// <returns></returns>
	T queryInternal(int ind, int st, int en, int l, int r) {
		if (st >= l && en <= r)
			return v[ind];
		if (l > en || r < st)
			return defval;
		int mid = st + (en - st) / 2;
		return func(queryInternal(ind * 2 + 1, st, mid, l, r),
			queryInternal(ind * 2 + 2, mid + 1, en, l, r));
	}

	/// <summary>
	/// returns sum between [l,r]
	/// index starts 0
	/// </summary>
	T query(int l, int r) {
		if (l > r)
			return 0;
		return queryInternal(0, 0, n - 1, l, r);
	}

	/// <summary>
	/// returns minimum x which is SUM(0,x) >= sum
	/// ind should be 0
	/// </summary>
	int querySumIndex(int ind, ll sum) {
		int left, right;
		left = ind * 2 + 1;
		right = left + 1;
		if (ind >= n - 1) {
			return (ind - n + 1);
		}
		//if (v[ind] < sum)
		//	return 0;
		if (v[left] >= sum) {
			return querySumIndex(left, sum);
		}
		else {
			return querySumIndex(right, sum - v[left]);
		}
	}
};

template <typename T> T my_gcd(T a, T b) { return gcd(a, b); }
template <typename T> T my_min(T a, T b) { return min(a, b); }
template <typename T> T my_max(T a, T b) { return max(a, b); }
template <typename T> T my_and(T a, T b) { return (a & b); }
template <typename T> T my_xor(T a, T b) { return (a ^ b); }
template <typename T> T my_or(T a, T b) { return (a | b); }
template <typename T> T my_sum(T a, T b) { return (a + b); }
template <typename T> T my_sum_mod(T a, T b) { return (a + b) % MOD; }

/// <summary>
/// index starts 0
/// </summary>
class SparseTable {

public:
	vvll table;
	ll(*func)(ll, ll);
	ll deep = 0;

	SparseTable(vector<ll> vec, ll(*f)(ll, ll)) {
		this->func = f;
		ll s = vec.size();
		deep = floor(log2(s));
		table.resize(deep + 1);
		table[0].resize(s);
		rep(i, 0, s)
			table[0][i] = vec[i];
		rep(k, 1, deep + 1) {
			ll g = pow(2, k - 1);
			table[k].resize(s);
			rep(i, 0, s - (g * 2 - 1)) {
				table[k][i] = f(table[k - 1][i], table[k - 1][i + g]);
			}
		}
	}

	/// <summary>
	/// index starts 0
	/// </summary>
	/// <param name="st">index of start pos</param>
	/// <param name="size">size of query</param>
	/// <returns></returns>
	ll query(ll st, ll size) {
		ll g = floor(log2(size));
		ll ret = this->func(table[g][st], table[g][st + size - pow(2, g)]);
		return ret;
	}

};

/// <summary>
/// index starts 1
/// </summary>
class BITree {
public:
	vector<ll> v;
	int sz;

	BITree(int n) {
		v.resize(n + 1, 0);
		sz = n;
	}

	void add(int ind, ll val) {
		int i = ind;
		while (i <= sz) {
			v[i] += val;
			i += (i & (-i));
		}
	}

	ll query(int ind) {
		ll r = 0;
		int i = ind;
		if (i > sz) i = sz;
		while (i > 0) {
			r += v[i];
			i -= (i & (-i));
		}
		return r;
	}
};


vll fact, invfact, inv;
void initFacts(ll n, ll m) {
	fact.resize(n + 1);
	invfact.resize(n + 1);
	inv.resize(n + 1);
	fact[0] = 1;
	invfact[0] = 1;
	inv[0] = 1;
	inv[1] = 1;
	rep(i, 1, n + 1) {
		fact[i] = (fact[i - 1] * i) % m;
	}
	rep(i, 2, n + 1) {
		inv[i] = -inv[m % i] * (m / i) % m;
		if (inv[i] < 0) inv[i] += m;
	}
	rep(i, 1, n + 1) {
		invfact[i] = invfact[i - 1] * inv[i] % m;
	}
}

ll nCk(ll n, ll k) {
	ll v = (((fact[n] * invfact[k]) % MOD) * invfact[n - k]) % MOD;
	return v;
}

ll modInverse(ll a, ll m)
{
	ll m0 = m;
	ll y = 0, x = 1;

	if (m == 1)
		return 0;

	while (a > 1) {
		// q is quotient
		int q = a / m;
		int t = m;

		// m is remainder now, process same as
		// Euclid's algo
		m = a % m, a = t;
		t = y;

		// Update y and x
		y = x - q * y;
		x = t;
	}

	// Make x positive
	if (x < 0)
		x += m0;

	return x;
}


class LazyPart {
public:


	LazyPart() {
	}

	LazyPart(ll aa) {
	}

	LazyPart& operator=(const LazyPart& other) {
		return *this;
	}

	void reset() {
	}
};

class LazyReal {
public:
	unordered_set<int> s;

	LazyReal() {
		s.clear();
	}

	LazyReal(int v) {
		s.insert(v);
	}

	LazyReal& operator=(const LazyReal& other) {
		s = other.s;
		return *this;
	}

	void reset() {
		s.clear();
	}
};


class lazySegmentTree {
public:
	vector<LazyReal> v;
	vector<LazyPart> z;
	LazyReal dummyReal;
	LazyPart dummyLazy;

	vb islazy;
	int n;
	LazyReal defval = dummyReal;

	lazySegmentTree() {
	}

	lazySegmentTree(int size) {
		n = 1;
		while (n < size) n *= 2;
		v.resize(2 * n, dummyReal);
		z.resize(2 * n, dummyLazy);
		islazy.resize(2 * n, false);
	}

	lazySegmentTree(int size, LazyReal defReal, LazyPart deflazy) {
		n = 1;
		while (n < size) n *= 2;
		defval = defReal;
		v.resize(2 * n, defReal);
		z.resize(2 * n, deflazy);
		islazy.resize(2 * n, false);
	}

	//gol function
	//a-ni urd taliih
	//need to implement
	LazyReal func(LazyReal& a, LazyReal& b) {
		LazyReal r = dummyReal;
		r.s = a.s;
		r.s.insert(b.s.begin(), b.s.end());
		return r;
	}

	//a-g b-eer shinechlene.
	//need to implement
	void applyLazy(LazyReal& a, LazyPart& b, int len) {
		//a.val += b.a;
	}
	//a-g b-eer shinechlene.
	//need to implement
	void passDownLazy(LazyPart& a, LazyPart& b) {
		//a.a += b.a;
	}


	void passDown(int ind, ll len) {
		if (!islazy[ind]) return;
		LazyPart t = z[ind];
		z[ind].reset();
		//update current value
		applyLazy(v[ind], t, len);
		islazy[ind] = false;

		if (ind >= n - 1) return;

		//update lazy part of childs
		int d = ind * 2 + 1;
		passDownLazy(z[d], t);
		islazy[d] = true;
		d = ind * 2 + 2;
		passDownLazy(z[d], t);
		islazy[d] = true;
	}

	void setNode(int ind, LazyReal val) {
		v[ind + n - 1] = val;
	}

	void calculateTree() {
		for (int i = n - 2; i >= 0; i--)
			v[i] = func(v[i * 2 + 1], v[i * 2 + 2]);
	}

	LazyReal queryInternal(int ind, int st, int en, int us, int ue) {
		passDown(ind, en - st + 1);
		if (ue < st || en < us) return defval;
		if (us <= st && en <= ue) return v[ind];
		int mid = st + (en - st) / 2;
		LazyReal t1 = queryInternal(ind * 2 + 1, st, mid, us, ue);
		LazyReal t2 = queryInternal(ind * 2 + 2, mid + 1, en, us, ue);
		return func(t1, t2);
	}

	LazyReal query(int us, int ue) {
		return  queryInternal(0, 0, n - 1, us, ue);
	}

	void updateRangeInternal(int ind, int st, int en, int us, int ue, LazyPart val) {
		passDown(ind, en - st + 1);
		if (ue < st || en < us) return;
		if (us <= st && en <= ue) {
			z[ind] = val;
			islazy[ind] = true;
			passDown(ind, en - st + 1);
			return;
		}
		int mid = st + (en - st) / 2;
		updateRangeInternal(ind * 2 + 1, st, mid, us, ue, val);
		updateRangeInternal(ind * 2 + 2, mid + 1, en, us, ue, val);
		v[ind] = func(v[ind * 2 + 1], v[ind * 2 + 2]);
		return;
	}

	void updateRange(int us, int ue, LazyPart val) {
		updateRangeInternal(0, 0, n - 1, us, ue, val);
	}

};

ll lis(vll& v, ll maxVal) {
	int n = v.size();
	vll dp(n, maxVal);
	for (int i = 0; i < n; i++) {
		//not acceptable same number
		//int x = (upper_bound(dp.begin(), dp.end(), v[i]) - dp.begin());
		//accept same number
		int x = (lower_bound(dp.begin(), dp.end(), v[i]) - dp.begin());
		dp[x] = v[i];
	}
	return (lower_bound(dp.begin(), dp.end(), maxVal) - dp.begin());
}



vector<ll> primes;
void findPrimes(int max_val) {
	primes.push_back(2);
	primes.push_back(3);
	for (ll i = 5; i <= max_val; i += 2) {
		int j = 0;
		ll max_val = sqrt(i);
		bool isprime = true;
		while (primes[j] <= max_val) {
			if (i % primes[j] == 0) {
				isprime = false;
				break;
			}
			j++;
		}
		if (isprime)
			primes.push_back(i);
	}
}

ll phi(ll n) {
	ll ans = n;
	ll i = 2;
	while (i * i <= n) {
		if (n % i == 0) {
			ans -= ans / i;
			while (n % i == 0)
				n /= i;
		}
		i++;
	}
	if (n != 1)
		ans -= ans / n;
	return ans;
}

ll bigPow(ll a, ll d, ll m) {
	if (a % m == 0) return 0;
	if (d == 0) return 1LL;
	ll r = bigPow(a, d / 2, m);
	r = (r * r) % m;
	if ((d % 2) == 1)
		r = (r * a) % m;
	return r;
}


void solve(int test) {
	ll n = 10000;
	cout << n<<"\n";
	rep(i, 0, n) {
		cout << "500000000 1000000000000000000";
		if (i == (n - 1)) {
			cout << endl;
		}
		else
			cout << "\n";
	}
}


int main() {
	//freopen("input.txt", "r", stdin);
	ios::sync_with_stdio(0); cin.tie(0);
	int test = 1;
	//cin >> test;
	for (int t = 1; t <= test; t++)
		solve(0);
	return 0;
}