func_code_string: #include <bits/stdc++.h>   using namespace std;   struct point {     int x, y;     point() : x(0), y(0) {}     point(int x, int y) : x(x), y(y) {}     point operator-(const point& p) const { return point(x - p.x, y - p.y); }     int dot(const point& p) const { return x * p.x + y * p.y; }     int cross(const point& p) const { return x * p.y - y * p.x; }   };   istream& operator>>(istream& is, point& p) { return is >> p.x >> p.y; }   bool pointInSegment(const point& a, const point& b, const point& p) {     return (p - a).cross(b - a) == 0 && (a - p).dot(b - p) <= 0;   }   bool pointInPerimeter(const vector<point>& P, const point& p) {     int n = P.size();     for (int i = 0; i < n; i++) {       if (pointInSegment(P[i], P[(i + 1) % n], p)) {         return true;       }     }     return false;   }   bool crossesRay(const point& a, const point& b, const point& p) {     return ((b.y >= p.y) - (a.y >= p.y)) * (a - p).cross(b - p) >= 0;   }   bool pointInPolygon(const vector<point>& P, const point& p) {     if (pointInPerimeter(P, p)) {       return true;     }     int n = P.size();     int rays = 0;     for (int i = 0; i < n; i++) {       rays += crossesRay(P[i], P[(i + 1) % n], p);     }     return rays & 1;   }   int sgn(int x) {     if (x > 0) return 1;     if (x < 0) return -1;     return 0;   }   int intersectSegmentsInfo(const point& a, const point& b, const point& c,                             const point& d) {     point v1 = b - a, v2 = d - c;     int t = sgn(v1.cross(c - a)), u = sgn(v1.cross(d - a));     if (t == u) {       if (t == 0) {         if (pointInSegment(a, b, c) || pointInSegment(a, b, d) ||             pointInSegment(c, d, a) || pointInSegment(c, d, b)) {           return -1;         } else {           return 0;         }       } else {         return 0;       }     } else {       return sgn(v2.cross(a - c)) != sgn(v2.cross(b - c));     }   }   int main() {     ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);     vector<point> a(4), b(4);     for (point& p : a) cin >> p;     for (point& p : b) cin >> p;     bool ans = false;     for (const point& p : a) {       ans = ans | pointInPolygon(b, p);     }     for (const point& p : b) {       ans = ans | pointInPolygon(a, p);     }     for (int i = 0; i < 4; ++i) {       for (int j = 0; j < 4; ++j) {         ans = ans | (intersectSegmentsInfo(a[i], a[(i + 1) % 4], b[j],                                            b[(j + 1) % 4]) != 0);       }     }     cout << (ans ?  YES  :  NO ) <<   n ;     return 0;   }   