#include #include #include #include #include #include #include #define REP(i, a, b) for (int i = int(a); i < int(b); i++) using namespace std; using ll = long long int; using P = pair; // clang-format off #ifdef _DEBUG_ #define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; PPPPP(__VA_ARGS__); cerr << endl; } while(false) template void PPPPP(T t) { cerr << t; } template void PPPPP(T t, S... s) { cerr << t << ", "; PPPPP(s...); } #else #define dump(...) do{ } while(false) #endif template vector make_v(size_t a, T b) { return vector(a, b); } template auto make_v(size_t a, Ts... ts) { return vector(a, make_v(ts...)); } template bool chmin(T &a, T b) { if (a > b) {a = b; return true; } return false; } template bool chmax(T &a, T b) { if (a < b) {a = b; return true; } return false; } template void print(T a) { cout << a << endl; } template void print(T a, Ts... ts) { cout << a << ' '; print(ts...); } template istream &operator,(istream &in, T &t) { return in >> t; } // clang-format on const ll inf = 1LL << 60; double eps = 1e-8; P up(int x1, int x2, int y1, int y2) { if (x1 < x2 && y1 <= y2) { return P(0, inf); } if (x1 < x2 && y1 > y2) { return P(0, double(x2 - x1) / (y1 - y2)); } if (x1 > x2 && y1 < y2) { return P(double(x1 - x2) / (y2 - y1), inf); } if (x1 > x2 && y1 >= y2) { return P(inf, 0); } if (x1 == x2 && y1 < y2) { return P(eps * 10, inf); } if (x1 == x2 && y1 >= y2) { return P(inf, 0); } } bool isSame(int x1, int x2, int x3, int y1, int y2, int y3, double m) { double a = x1 + y1 * m, b = x2 + y2 * m, c = x3 + y3 * m; dump(m, a, b, c); return abs(a - b) < eps || abs(a - c) < eps || abs(b - c) < eps; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int T; cin, T; REP(i, 0, T) { int x1, x2, x3, y1, y2, y3; cin, x1, x2, x3, y1, y2, y3; P p1 = up(x1, x2, y1, y2), p2 = up(-x2, -x3, -y2, -y3); P p3 = up(-x1, -x2, -y1, -y2), p4 = up(x2, x3, y2, y3); dump(p1.first, p1.second); dump(p2.first, p2.second); dump(p3.first, p3.second); dump(p4.first, p4.second); chmax(p1.first, p2.first); chmin(p1.second, p2.second); chmax(p3.first, p4.first); chmin(p3.second, p4.second); if (p1.first - eps <= p1.second) { if (abs(p1.first - p1.second) >= eps || !isSame(x1, x2, x3, y1, y2, y3, p1.first)) { cout << "YES" << endl; continue; } } if (p3.first - eps <= p3.second) { if (abs(p3.first - p3.second) >= eps || !isSame(x1, x2, x3, y1, y2, y3, p3.first)) { cout << "YES" << endl; continue; } } cout << "NO" << endl; } return 0; }