John's barn has a fence consisting of N consecutive sections numbered from left to right from 1 to N. Each part is first painted in one of two colors: red or green, your information is given with string C. The color of the I-th part Ci will be equal to 'R' if the color of the part is red and 'G' if it is green. John decided to paint the whole fence green. To make the normal drawing process more fun he decided to do it using the following process. Every minute (until the whole fence is painted green) you will do the following steps: Select any part of the phone that is painted red. Let's show the index of this section as X. In each section with references X, X + 1, ., min (N, X + K - 1), flip the color of the corresponding part from red to green and from green to red by re-painting. John wonders how quickly he can paint the phone. Please help her find the minimum number of minutes needed to repaint.

John's barn has a fence consisting of N consecutive sections numbered from left to right from 1 to N. Each part is first painted in one of two colors: red or green, your information is given with string C. The color of the I-th part Ci will be equal to 'R' if the color of the part is red and 'G' if it is green. John decided to paint the whole fence green. To make the normal drawing process more fun he decided to do it using the following process. Every minute (until the whole fence is painted green) you will do the following steps: Select any part of the phone that is painted red. Let's show the index of this section as X. In each section with references X, X + 1, ., min (N, X + K - 1), flip the color of the corresponding part from red to green and from green to red by re-painting. John wonders how quickly he can paint the phone. Please help her find the minimum number of minutes needed to repaint.

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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Concept explainers

Methods of StringBuilder class

The StringBuilder class can be used to create mutable strings. The methods defined in the StringBuilder class are widely used to manipulate and concatenate strings. It is a non-synchronized class which has public methods that can be accessed by multiple threads. It is not thread-safe.

Question

Answer in C++ Only Solution:
John's barn has a fence consisting of N consecutive sections numbered from left to right from 1 to N.
Each part is first painted in one of two colors: red or green, your information is given with string C.
The color of the l-th part Ci will be equal to 'R' if the color of the part is red and 'G' if it is green.
John decided to paint the whole fence green. To make the normal drawing process more fun he
decided to do it using the following process. Every minute (until the whole fence is painted green)
you will do the following steps:
Select any part of the phone that is painted red. Let's show the index of this section as X.
In each section with references X, X + 1, ., min (N, X + K - 1), flip the color of the corresponding part
from red to green and from green to red by re-painting.
John wonders how quickly he can paint the phone. Please help her find the minimum number of
minutes needed to repaint.
Input:
1
73
RGGRGRG
Output:
4

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