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g2301_2400.s2365_task_scheduler_ii.readme.md Maven / Gradle / Ivy

2365\. Task Scheduler II

Medium

You are given a **0-indexed** array of positive integers `tasks`, representing tasks that need to be completed **in order**, where `tasks[i]` represents the **type** of the ith task.

You are also given a positive integer `space`, which represents the **minimum** number of days that must pass **after** the completion of a task before another task of the **same** type can be performed.

Each day, until all tasks have been completed, you must either:

*   Complete the next task from `tasks`, or
*   Take a break.

Return _the **minimum** number of days needed to complete all tasks_.

**Example 1:**

**Input:** tasks = [1,2,1,2,3,1], space = 3

**Output:** 9

**Explanation:** 

One way to complete all tasks in 9 days is as follows: 

Day 1: Complete the 0th task. 

Day 2: Complete the 1st task.

Day 3: Take a break.

Day 4: Take a break. 

Day 5: Complete the 2nd task. 

Day 6: Complete the 3rd task.

Day 7: Take a break. 

Day 8: Complete the 4th task. 

Day 9: Complete the 5th task. 

It can be shown that the tasks cannot be completed in less than 9 days.

**Example 2:**

**Input:** tasks = [5,8,8,5], space = 2

**Output:** 6

**Explanation:** 

One way to complete all tasks in 6 days is as follows:

Day 1: Complete the 0th task.

Day 2: Complete the 1st task. 

Day 3: Take a break.

Day 4: Take a break.

Day 5: Complete the 2nd task.

Day 6: Complete the 3rd task. 

It can be shown that the tasks cannot be completed in less than 6 days.

**Constraints:**

*   1 <= tasks.length <= 105
*   1 <= tasks[i] <= 109
*   `1 <= space <= tasks.length`