func_code_string: #include <bits/stdc++.h>   using namespace std;   using namespace rel_ops;   const double PI = acos((double)-1);   int ts, ts2, ts3, ts4;   int n, m;   long long gcd(long long x, long long y) {     long long t;     for (; y != 0;) {       t = x % y;       x = y;       y = t;     }     return x;   }   class point {    public:     double x, y;     point() { x = y = 0; }     point(double a, double b) { x = a, y = b; }     inline friend point operator+(const point &A, const point &B) {       return point(A.x + B.x, A.y + B.y);     }     inline friend point operator-(const point &A, const point &B) {       return point(A.x - B.x, A.y - B.y);     }     inline friend point operator*(const point &A, double p) {       return point(A.x * p, A.y * p);     }     inline friend point operator/(const point &A, double p) {       return point(A.x / p, A.y / p);     }     inline friend void operator+=(point &A, const point &B) { A = A + B; }     inline friend void operator-=(point &A, const point &B) { A = A - B; }     inline friend void operator*=(point &A, double B) { A = A * B; }     inline friend void operator/=(point &A, double B) { A = A / B; }     inline friend bool operator<(const point &A, const point &B) {       return A.x < B.x - 1E-10 || fabs(A.x - B.x) < 1E-10 && A.y + 1E-10 < B.y;     }     inline friend bool operator==(const point &A, const point &B) {       return !(A < B || B < A);     }     inline friend bool operator>(const point &A, const point &B) { return B < A; }   };   class XL {    public:     point a, b;     XL() {}     XL(point x, point y) {       a = x;       b = y;     }     XL(double t1, double t2, double t3, double t4) {       a.x = t1;       a.y = t2;       b.x = t3;       b.y = t4;     }   };   inline double gag(double x) {     if (x < -PI - 1E-10) return gag(x + 2 * PI);     if (x > PI - 1E-10) return gag(x - 2 * PI);     return x;   }   inline double gag2(double x) {     if (x < -1E-10) return gag2(x + 2 * PI);     if (x > 2 * PI - 1E-10) return gag2(x - 2 * PI);     return x;   }   inline double sqr(double x) { return x * x; }   inline double chaji(const point &A, const point &B) {     return A.x * B.y - B.x * A.y;   }   inline double dianji(const point &A, const point &B) {     return A.x * B.x + A.y * B.y;   }   inline double dis(const point &A, const point &B) {     return sqrt(sqr(A.x - B.x) + sqr(A.y - B.y));   }   inline double dis(const XL &A) { return dis(A.a, A.b); }   inline double dis(const point &A) { return sqrt(sqr(A.x) + sqr(A.y)); }   inline double atan2(const point &A) { return gag(atan2(A.y, A.x)); }   inline point shengcheng(double JD, double CD = 1.0) {     return point(cos(JD) * CD, sin(JD) * CD);   }   inline short sgn(double x) {     if (fabs(x) < 1E-10)       return 0;     else if (x < 0)       return -1;     else       return 1;   }   point ref(point a, point b) { return point(b.x * 2 - a.x, b.y * 2 - a.y); }   point s[5];   double sqr(point a) { return sqr(a.x) + sqr(a.y); }   int getcan;   point getwjy(point a, point b, point c) {     double d = 2 * (a.x * (b.y - c.y) + b.x * (c.y - a.y) + c.x * (a.y - b.y));     getcan = 1;     if (d == 0) {       getcan = 0;       return point(0, 0);     }     return point(         (sqr(a) * (b.y - c.y) + sqr(c) * (a.y - b.y) + sqr(b) * (c.y - a.y)) / d,         (sqr(a) * (c.x - b.x) + sqr(b) * (a.x - c.x) + sqr(c) * (b.x - a.x)) / d);   }   bool jud(point a, point b, point c) {     double u1, u2, u3, u4, u5, u6, u7, u8, u9;     s[2] = getwjy(a, ref(c, b), b);     if (getcan == 0) return 0;     s[3] = getwjy(ref(a, b), b, c);     if (getcan == 0) return 0;     s[1] = ref(s[2], a);     s[4] = ref(s[3], c);     int i;     for (i = 1; i <= 4; i++)       if ((u1 = chaji(s[i % 4 + 1] - s[i], s[(i + 1) % 4 + 1] - s[i % 4 + 1])) *               (u2 = chaji(s[(i + 1) % 4 + 1] - s[(i % 4 + 1)],                           s[((i + 1) + 1) % 4 + 1] - s[(i + 1) % 4 + 1])) <=           0)         break;     if (i <= 4) return 0;     cout <<  YES n ;     for (int i = 1; i <= 4; i++)       printf( %.9lf %.9lf%c , s[i].x, s[i].y, i == 4 ?   n  :    );     return 1;   }   int main() {     long long i, j, k, l, t1, t2, t3, t4, t5, t6, t7, t8, t9, t, nw;     int tt1, tt2, tt3, tt4;     double u1, u2, u3, u4, u5, u6, u7, u8, u9;     char c1, c2, c3;     srand((unsigned)time(0));     int _;     point a, b, c;     for (cin >> _; _--;) {       cin >> a.x >> a.y >> b.x >> b.y >> c.x >> c.y;       if (jud(c, a, b)) continue;       if (jud(a, b, c)) continue;       if (jud(b, c, a)) continue;       cout <<  NO n n ;     }     return 0;   }   