#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; }