Minimum Initial Energy to Finish Tasks
You are given an array tasks where tasks[i] = [actuali, minimumi]: For example, if the task is [10, 12] and your current energy is 11, you cannot start this task.
You are given an array tasks where tasks[i] = [actuali, minimumi]:
For example, if the task is [10, 12] and your current energy is 11, you cannot start this task. However, if your current energy is 13, you can complete this task, and your energy will be 3 after finishing it.
You can finish the tasks in any order you like.
Return the minimum initial amount of energy you will need to finish all the tasks.
Example 1
Input: tasks = [[1,2],[2,4],[4,8]]
Output: 8
Explanation: Starting with 8 energy, we finish the tasks in the following order: - 3rd task. Now energy = 8 - 4 = 4. - 2nd task. Now energy = 4 - 2 = 2. - 1st task. Now energy = 2 - 1 = 1. Notice that even though we have leftover energy, starting with 7 energy does not work because we cannot do the 3rd task.
Example 2
Input: tasks = [[1,3],[2,4],[10,11],[10,12],[8,9]]
Output: 32
Explanation: Starting with 32 energy, we finish the tasks in the following order: - 1st task. Now energy = 32 - 1 = 31. - 2nd task. Now energy = 31 - 2 = 29. - 3rd task. Now energy = 29 - 10 = 19. - 4th task. Now energy = 19 - 10 = 9. - 5th task. Now energy = 9 - 8 = 1.
Example 3
Input: tasks = [[1,7],[2,8],[3,9],[4,10],[5,11],[6,12]]
Output: 27
Explanation: Starting with 27 energy, we finish the tasks in the following order: - 5th task. Now energy = 27 - 5 = 22. - 2nd task. Now energy = 22 - 2 = 20. - 3rd task. Now energy = 20 - 3 = 17. - 1st task. Now energy = 17 - 1 = 16. - 4th task. Now energy = 16 - 4 = 12. - 6th task. Now energy = 12 - 6 = 6.
Constraints
- 1 <= tasks.length <= 10^5
- 1 <= actuali <= minimumi <= 10^4
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