#include <iostream>
#include <graphics.h>
#include <cmath>

using namespace std;

int main() {
    int gd = DETECT, gm;
    initgraph(&gd, &gm, "");

    line(100, 400, 400, 400);
    line(100, 400, 100, 100);

    for (int x = 100; x <= 400; x++) {
        double y = abs(x - 100) * (x - 100) / 100 + abs(x - 100) / 100 - 3 * (x - 100) / 100 + 400;
        putpixel(x, y, GREEN);
    }

    getch();
    closegraph();

    return 0;
}