2140-solving-questions-with-brainpower.adoc

2140. Solving Questions With Brainpower

{leetcode}/problems/solving-questions-with-brainpower/[LeetCode - 2140. Solving Questions With Brainpower ^]

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

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 points<sub>i</sub> points but you will be unable to solve each of the next brainpower<sub>i</sub> 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]]:

• If question 0 is solved, you will earn 3 points but you will be unable to solve questions 1 and 2.

• If instead, question 0 is skipped and question 1 is solved, you will earn 4 points but you will be unable to solve questions 2 and 3.

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:

• 1 ⇐ questions.length ⇐ 105

• questions[i].length == 2

• 1 ⇐ points<sub>i</sub>, brainpower<sub>i</sub> ⇐ 105

思路分析

一刷

link:{sourcedir}/_2140_SolvingQuestionsWithBrainpower.java[role=include]

参考资料