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| 0438 |[Find All Anagrams in a String](src/main/js/g0401_0500/s0438_find_all_anagrams_in_a_string/solution.js)| Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1) | 5 | 99.89
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#### Day 6 Breadth First Search Depth First Search
| 0438 |[Find All Anagrams in a String](src/main/js/g0401_0500/s0438_find_all_anagrams_in_a_string/solution.js)| Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1) | 5 | 99.89
| 0438 |[Find All Anagrams in a String](src/main/js/g0401_0500/s0438_find_all_anagrams_in_a_string/solution.js)| Medium | Top_100_Liked_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n+m)_Space_O(1) | 5 | 99.89
Given two strings `s` and `p`, return _an array of all the start indices of_`p`_'s anagrams in_`s`. You may return the answer in **any order**.
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An **Anagram** is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.
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**Example 1:**
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**Input:** s = "cbaebabacd", p = "abc"
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**Output:**[0,6]
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**Explanation:**
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The substring with start index = 0 is "cba", which is an anagram of "abc".
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The substring with start index = 6 is "bac", which is an anagram of "abc".
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**Example 2:**
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**Input:** s = "abab", p = "ab"
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**Output:**[0,1,2]
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**Explanation:**
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The substring with start index = 0 is "ab", which is an anagram of "ab".
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The substring with start index = 1 is "ba", which is an anagram of "ab".
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The substring with start index = 2 is "ab", which is an anagram of "ab".
You are given an integer array `nums` and an integer `target`.
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You want to build an **expression** out of nums by adding one of the symbols `'+'` and `'-'` before each integer in nums and then concatenate all the integers.
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* For example, if `nums = [2, 1]`, you can add a `'+'` before `2` and a `'-'` before `1` and concatenate them to build the expression `"+2-1"`.
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Return the number of different **expressions** that you can build, which evaluates to `target`.
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**Example 1:**
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**Input:** nums = [1,1,1,1,1], target = 3
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**Output:** 5
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**Explanation:** There are 5 ways to assign symbols to make the sum of nums be target 3.
Given the `root` of a binary tree, return _the length of the **diameter** of the tree_.
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The **diameter** of a binary tree is the **length** of the longest path between any two nodes in a tree. This path may or may not pass through the `root`.
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The **length** of a path between two nodes is represented by the number of edges between them.
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