Dinner, a kind of noodle soup with rice. Mr. Ping makes the best noodle soup and his son Po is eagerly awaiting user reviews on his father's blog. Users can vote on (+) or -- and +1 or -1 can be added to the number of points respectively. Note that if a user votes multiple times, only his or her latest vote is calculated from the total value. Po opens a blog to see the first 0 points. In order to see updated points without updating the page, they must continue to vote. After each click of Po (+) or (-), he can see the current total points, which takes Po's vote again. He wonders how many users without him would have voted. Judging by the sequence of clicks made by Po and the total number of points displayed immediately after each click, can you tell him the minimum number of users who are likely to vote at least once, without Po.

Dinner, a kind of noodle soup with rice. Mr. Ping makes the best noodle soup and his son Po is eagerly awaiting user reviews on his father's blog. Users can vote on (+) or -- and +1 or -1 can be added to the number of points respectively. Note that if a user votes multiple times, only his or her latest vote is calculated from the total value. Po opens a blog to see the first 0 points. In order to see updated points without updating the page, they must continue to vote. After each click of Po (+) or (-), he can see the current total points, which takes Po's vote again. He wonders how many users without him would have voted. Judging by the sequence of clicks made by Po and the total number of points displayed immediately after each click, can you tell him the minimum number of users who are likely to vote at least once, without Po.

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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