#include<iostream>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<utility>
#include<cassert>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
const ll mod = 1000000009;
const ll INF = mod * mod;
typedef pair<int, int> P;
#define stop char nyaa;cin>>nyaa;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
typedef pair<ll, ll> LP;
typedef vector<ll> vec;
typedef vector<string> svec;
typedef long double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-5;

void solve() {
	int n; cin >> n;
	int a, b; cin >> a >> b;
	if (n == 1) {
		cout << "0 0" << endl; return;
	}
	int chk = 0;
	for (int i = 2; i <= n; i++) {
		if (i*(i - 1) / 2 > a) {
			chk = i - 1; break;
		}
	}
	vector<P> ans;
	int r = a - (chk*(chk - 1) / 2);
	rep(i, chk-r) {
		ans.push_back({ 0,0 });
	}
	rep(i, r) {
		ans.push_back({ 9,0 });
	}
	ans.push_back({ 18,0 });
	int sum = a + (chk - r);
	int rest = b - sum;
	if (rest == 0) {
		int cur = 100000;
		while (ans.size() < n) {
			ans.push_back({ 100000,cur });
			cur -= 50;
		}
		rep(i, n) {
			cout << ans[i].first << " " << ans[i].second << endl;
		}
		return;
	}
	int chk2 = 0;
	for (int i = 2; i <= n; i++) {
		if (i*(i - 1) / 2 > rest) {
			chk2 = i-1; break;
		}
	}
	int rr = rest - chk2 * (chk2 - 1) / 2;
	int x = rest - rr; int y = rr;
	rep(i, x) {
		ans.push_back({ 0,50 });
	}
	rep(i, y) {
		ans.push_back({ 18,50 });
	}
	ans.push_back({ 36,50 });
	int cur = 100000;
	while (ans.size() < n) {
		ans.push_back({ 100000,cur });
		cur -= 50;
	}
	rep(i, n) {
		cout << ans[i].first << " " << ans[i].second << endl;
	}
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	//cout << fixed << setprecision(5);
	//init();
	solve();
	//cout << "finish" << endl;
	//stop
	return 0;
}