Package g2101_2200.s2140_solving_questions_with_brainpower

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    2140 - Solving Questions With Brainpower.

    Medium

    You are given a 0-indexed 2D integer array questions where <code>questionsi = points<sub>i</sub>, brainpower<sub>i</sub></code>.

    The array describes the questions of an exam, where you have to process the questions in order (i.e., starting from question 0) and make a decision whether to solve or skip each question. Solving question i will earn you <code>points<sub>i</sub></code> points but you will be unable to solve each of the next <code>brainpower<sub>i</sub></code> questions. If you skip question i, you get to make the decision on the next question.

    • For example, given questions = \[\[3, 2], [4, 3], [4, 4], [2, 5]]:

    Return the maximum points you can earn for the exam.

    Example 1:

    Input: questions = \[\[3,2],4,3,4,4,2,5]

    Output: 5

    Explanation: The maximum points can be earned by solving questions 0 and 3.

    • Solve question 0: Earn 3 points, will be unable to solve the next 2 questions

    • Unable to solve questions 1 and 2

    • Solve question 3: Earn 2 points

    Total points earned: 3 + 2 = 5. There is no other way to earn 5 or more points.

    Example 2:

    Input: questions = \[\[1,1],2,2,3,3,4,4,5,5]

    Output: 7

    Explanation: The maximum points can be earned by solving questions 1 and 4.

    • Skip question 0

    • Solve question 1: Earn 2 points, will be unable to solve the next 2 questions

    • Unable to solve questions 2 and 3

    • Solve question 4: Earn 5 points

    Total points earned: 2 + 5 = 7. There is no other way to earn 7 or more points.

    Constraints:

    • <code>1 <= questions.length <= 10<sup>5</sup></code>

    • questions[i].length == 2

    • <code>1 <= points<sub>i</sub>, brainpower<sub>i</sub><= 10<sup>5</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Long mostPoints(Array<IntArray> questions)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait