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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

Problem 1PE

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Question

Imagine you are reading in a stream of integers. Periodically, you wish
to be able to look up the rank of a number x (the number of values less than or equal to x). Implement the data structures and algorithms to support these operations. That is, implement the method track(int x), which is called when each number is generated, and the method getRankOfNumber(int x), which returns the number of values less than or equal to x (not
including x itself).
EXAMPLE
Stream(in order of appearance):5, 1, 4, 4, 5, 9, 7, 13, 3
getRankOfNumber(l) 0
getRankOfNumber(3) 1
getRankOfNumber(4) 3

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