#include <iostream>
#include <graphics.h>
#include <cmath>
#include <fstream>
#include <cstdlib>
#include <ctime>

using namespace std;

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

    srand(time(0));
    ofstream fileX("x.txt"), fileY("y.txt");

    for (int i = 0; i < 100; i++) {
        int x = rand() % 31 - 5;
        int y = rand() % 31 - 5;
        fileX << x << endl;
        fileY << y << endl;
    }

    fileX.close();
    fileY.close();

    ifstream fileXRead("x.txt"), fileYRead("y.txt");
    int x, y;
    while (fileXRead >> x && fileYRead >> y) {
        int graphX = x * 10 + 100;
        int graphY = 400 - y * 10;

        if (x + y == 35) {
            circle(graphX, graphY, 5);
        } else {
            putpixel(graphX, graphY, WHITE);
        }
    }

    fileXRead.close();
    fileYRead.close();

    getch();
    closegraph();

    return 0;
}