#include <iostream>
#include <fstream>
#include <algorithm>
#include <math.h>
#include <string>
#include <vector>
#include <stdio.h>
#include <queue>

#define LL long long
#define pb push_back
#define lm 10001
#define MOD 1000000007

using namespace std;

double x,y;

int main()
{
    //freopen("data.in","r",stdin);
    cin>>x;
    cout<<"0 0\n";
    cout.flush();
    while(cin>>x>>y)
    {
        cout<<-x<<' '<<-y<<'\n';
        cout.flush();
    }
    
    return 0;
}