{ "data": { "question": { "questionId": "3212", "questionFrontendId": "2963", "boundTopicId": null, "title": "Count the Number of Good Partitions", "titleSlug": "count-the-number-of-good-partitions", "content": "

You are given a 0-indexed array nums consisting of positive integers.

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A partition of an array into one or more contiguous subarrays is called good if no two subarrays contain the same number.

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Return the total number of good partitions of nums.

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Since the answer may be large, return it modulo 109 + 7.

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Example 1:

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\nInput: nums = [1,2,3,4]\nOutput: 8\nExplanation: The 8 possible good partitions are: ([1], [2], [3], [4]), ([1], [2], [3,4]), ([1], [2,3], [4]), ([1], [2,3,4]), ([1,2], [3], [4]), ([1,2], [3,4]), ([1,2,3], [4]), and ([1,2,3,4]).\n
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Example 2:

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\nInput: nums = [1,1,1,1]\nOutput: 1\nExplanation: The only possible good partition is: ([1,1,1,1]).\n
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Example 3:

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\nInput: nums = [1,2,1,3]\nOutput: 2\nExplanation: The 2 possible good partitions are: ([1,2,1], [3]) and ([1,2,1,3]).\n
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Constraints:

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