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#include <iostream> #include <fstream> using namespace std; float CTx; float CTy; // Задача 3 float s(float a, float b) { return a * b; } float p(float a, float b) { return 2 * (a + b); } void CT(float a, float b, float x1, float y1) { CTx = x1 + (a / 2); CTy = y1 - (b / 2); } int main() { // Задача 3 ifstream in("input.txt"); float x1, x2, x3, x4, y1, y2, y3, y4, a, b; cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4; a = x2 - x1; b = y1 - y3; CT(a, b, x1, y1); cout << s(a, b) << endl << p(a, b) << endl << CTx << ' ' << CTy; }