#include <bits/stdc++.h>

using namespace std;
typedef int64_t var;

int main() {

    double a, b;
    cin>>a;
    cout<<"0 0"<<endl;
    cout.flush();
    while(cin>>a>>b) {
        cout<<-a<<" "<<-b<<endl;
        cout.flush();
    }

    return 0;
}