def solve(a, b, c, window):
    xmin, xmax, ymin, ymax = window
    L = []
    for x in range(xmin, xmax + 1):
        for y in range(ymin, ymax + 1):
            if a * x + b * y + c == 0:
                L.append((x, y))
    return L

s = 10
win = [-s, s, -s, s]
print(solve(2, 3, -7, win))


s = 200
win = [-s, s, -s, s]
print(solve(189, 255, -3, win))