func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int x1, y1, x2, y2, x3, y3;     cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;     cout << 3 << endl;     cout << x2 - x1 <<     << y3 - y1 << endl;     cout << x1 - x2 <<     << y3 - y2 << endl;     cout << x2 - x3 <<     << y1 - y3 << endl;   }   void solveexpr(double a, double b, double c, double d, double e, double f) {     double determinant = a * d - b * c;     if (determinant != 0) {       double x = (e * d - b * f) / determinant;       double y = (a * f - e * c) / determinant;       printf( %0.0f %0.0f n , x, y);     }   }   void solve1() {     int x1, y1, x2, y2, x3, y3, x, y;     cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;     cout << 3 << endl;     int val1 = x1 + x2;     int val2 = y1 + y2;     x = val1 - x3;     y = val2 - y3;     cout << x <<     << y << endl;     val1 = x3 + x1;     val2 = y3 + y1;     x = val1 - x2;     y = val2 - y2;     cout << x <<     << y << endl;     val1 = x3 + x2;     val2 = y3 + y2;     x = val1 - x1;     y = val2 - y1;     cout << x <<     << y << endl;   }   int main() {     int t = 1;     while (t--) {       solve1();     }   }   