#include <bits/stdc++.h>

#define ll long long
#define pb push_back
#define mp make_pair
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(x) (x).begin(), (x).end()
#define fi first
#define se second

using namespace std;

int sz, x, y;

int main()
{
    cin.sync_with_stdio(false);

    cin >> sz;

    cout << "0 0";
    cout << '\n';
    cout.flush();

    while(cin >> x >> y)
    {
        cout << -x << " " << -y;
        cout << '\n';
        cout.flush();
    }

    return 0;
}