#include using namespace std; #define fs first #define sc second #define pb push_back #define mp make_pair #define eb emplace_back #define ALL(A) A.begin(),A.end() #define RALL(A) A.rbegin(),A.rend() typedef long long LL; typedef pair P; template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } template T gcd(T a,T b){return b?gcd(b,a%b):a;} const LL mod=1000000007; const LL LINF=1LL<<62; const int INF=1<<30; int dx[]={1,0,-1,0,1,-1,1,-1}; int dy[]={0,1,0,-1,1,-1,-1,1}; int main(){ cout << 0 << " " << 0 << endl; int d;cin >> d; if(d == 0) return 0; cout << 1000000000 << " " << 0 << endl; int dd;cin >> dd; if(dd == 0) return 0; int ansy = (d + dd - 1000000000) / 2; cout << 0 << " " << ansy << endl; int ansx;cin >> ansx; if(ansx == 0) return 0; cout << ansx << " " << ansy << endl; cin >> d; if(d == 0) return 0; assert(false); }