BufferedImage img = ImageIO.read(new File("input.jpg"))
for (x, y in pixels) {
    int rgb = img.getRGB(x, y)
    int r = (rgb >> 16) & 0xFF
    int g = (rgb >> 8) & 0xFF
    int b = rgb & 0xFF

int gray = (r + g + b) / 3
img.setRGB(x, y, (gray << 16) | (gray << 8) | gray)
}

ImageIO.write(img, "jpg", new File("output.jpg"))

import java.time.*;

ZonedDateTime target = ZonedDateTime.of(
    2025, 12, 31, 23, 59, 0, 0, ZoneId.systemDefault() // год, мес, день, часы, минуты
);

Duration d = Duration.between(ZonedDateTime.now(), target);
if (d.isNegative()) { System.out.println("Событие уже прошло"); return; }

long days = d.toDays();
long hours = d.minusDays(days).toHours();
long mins = d.minusDays(days).minusHours(hours).toMinutes();
System.out.println("Осталось: " + days + " д " + hours + " ч " + mins + " м");