Hello everyone. Today i meet a problem like find the intersection areas of n rectangles. i use IT tree but i can't not solve with case have a area that more than 3 rectangles intersection. Very thanks you help me to solve this proplem.
→ Обратите внимание
→ Лидеры (рейтинг)
| № | Пользователь | Рейтинг |
|---|---|---|
| 1 | jiangly | 3810 |
| 2 | Benq | 3676 |
| 3 | Kevin114514 | 3655 |
| 4 | maroonrk | 3463 |
| 5 | strapple | 3447 |
| 6 | Um_nik | 3387 |
| 7 | heuristica | 3322 |
| 8 | turmax | 3317 |
| 9 | tourist | 3307 |
| 10 | jiangbowen | 3291 |
| Страны | Города | Организации | Всё → |
→ Лидеры (вклад)
| № | Пользователь | Вклад |
|---|---|---|
| 1 | Qingyu | 155 |
| 2 | nik_exists | 150 |
| 2 | maspy | 150 |
| 4 | Um_nik | 143 |
| 5 | Errichto | 139 |
| 6 | adamant | 137 |
| 7 | AmShZ | 136 |
| 8 | BledDest | 132 |
| 9 | maroonrk | 131 |
| 10 | qwexd | 129 |
→ Найти пользователя
→ Прямой эфир
Codeforces (c) Copyright 2010-2026 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 26.09.2026 04:31:36 (i1).
Десктопная версия, переключиться на мобильную.
При поддержке
Intersection of two rectangles is a rectangle. I don't think any further explanation is really necessary. A bit of casework and the problem is done.
Good luck!
By mentioning IT tree, which I suppose is segment tree, I think you realized this problem can be solved with sweep line and range queries. A classic problem would be to find union of $$$n$$$ rectangles instead of intersection. If you know how to solve for union, I think you can also solve for intersection.