496. Next Greater element I Another array that corresponds to larger elements

Source: Internet
Author: User

[Copy question]:

You are given arrays (without duplicates) and `nums1` `nums2` where's `nums1` elements is subset of `nums2` . Find all the next greater numbers for `nums1` ' s elements in the corresponding places of `nums2` .

The Next Greater number of a number x in was the first Greater number to their right in `nums1` `nums2` . If It does not exist, output-1 for this number.

Example 1:

`INPUT:NUMS1 = [4,1,2], NUMS2 = [1,3,4,2]. Output: [ -1,3,-1]explanation:    for number 4 in the first array, cannot find the next greater number for it in the S Econd array, so output-1.    For number 1 with the first array, the next greater number for it in the second array is 3.    For number 2 in the first array, there are no next greater number for it in the second array, so output-1.`

Example 2:

```INPUT:NUMS1 = [2,4], NUMS2 = [1,2,3,4]. Output: [3,-1]explanation:    for number 2 in the first array, the next greater number for it in the second array is 3.
for number 4 in the first array, there are no next greater number for it in the second array, so output-1.```

[Brute force solution]:

Time Analysis:

Spatial Analysis:

[After optimization]:

Time Analysis:

Spatial Analysis:

[Wonderful output CONDITIONS]:

[Wonderful corner case]:

[Thinking questions]:

Feel the problem with stack is very difficult, basic backrest. Summarized below.

[a sentence of thought]:

[input]: null: Normal: Large: Extra Small: Special cases handled in the program: abnormal conditions (unreasonable input):

[Drawing]:

[One brush]:

[Two brushes]:

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[Results of five-minute visual debug]:

[Summary]:

[Complexity]:time Complexity:o () Space complexity:o ()

[English data structure or algorithm, why not other data structures or algorithms]:

[Key templating code]:

[Other solutions]:

Next Greater Element II still uses a stack

[The problem given by the LC becomes variable]:

[Code Style]:

496. Next Greater element I Another array that corresponds to larger elements

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