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In the old country of Hono-Lolo, all cities are situated by the river. As we all know, the river has two sides. There are N cities on the left side of the river with ID numbers between 1 and N, inclusively. Similarly, there are N cities on the right side of the river with ID numbers between 1 and N, inclusively. Aiming to unite the country, Ali the president of Hono-Lolo decided to build bridges between cities on the left side and the right side. A bridge can be built between cities a and b if they are on different sides of the river and also if la-b| <= 4. Find the maximum number of bridges that can be built with no two bridges intersecting (even on endpoints).

In the old country of Hono-Lolo, all cities are situated by the river. As we all know, the river has two sides. There are N cities on the left side of the river with ID numbers between 1 and N, inclusively. Similarly, there are N cities on the right side of the river with ID numbers between 1 and N, inclusively. Aiming to unite the country, Ali the president of Hono-Lolo decided to build bridges between cities on the left side and the right side. A bridge can be built between cities a and b if they are on different sides of the river and also if la-b| <= 4. Find the maximum number of bridges that can be built with no two bridges intersecting (even on endpoints).

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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In the old country of Hono-Lolo, all cities are situated by the river. As we all know, the river has two sides. There are N cities on the left side of the river with ID numbers between 1 and N, inclusively. Similarly, there are N cities on the right side of the river with ID numbers between 1 and N, inclusively. Aiming to unite the country, Ali the president of Hono-Lolo decided to build bridges between cities on the left side and the right side. A bridge can be built between cities a and b if they are on different sides of the river and also if la-b| <= 4. Find the maximum number of bridges that can be built with no two bridges intersecting (even on endpoints).
Transcribed Image Text:In the old country of Hono-Lolo, all cities are situated by the river. As we all know, the river has two sides. There are N cities on the left side of the river with ID numbers between 1 and N, inclusively. Similarly, there are N cities on the right side of the river with ID numbers between 1 and N, inclusively. Aiming to unite the country, Ali the president of Hono-Lolo decided to build bridges between cities on the left side and the right side. A bridge can be built between cities a and b if they are on different sides of the river and also if la-b| <= 4. Find the maximum number of bridges that can be built with no two bridges intersecting (even on endpoints).
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