# Leetcode given an array a of integers return the length of the longest arithmetic subsequence in a

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# Leetcode given an array a of integers return the length of the longest arithmetic subsequence in a

1. Title description. Given two strings text1 and text2, return the length of the longest common subsequence of these two strings. A subsequence of a character string refers to a new character string: it is a new character string formed by deleting certain characters (or without deleting any characters) from the original character string without changing the relative order of the characters.

# Leetcode given an array a of integers return the length of the longest arithmetic subsequence in a

28. Implement strStr() # 题目 # Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "hello", needle = "ll" Output: 2 Example 2: Input: haystack = "aaaaa", needle = "bba" Output: -1 Clarification: What should we return when needle is an empty string? This is a great question to ask during an ...

# Leetcode given an array a of integers return the length of the longest arithmetic subsequence in a

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# Leetcode given an array a of integers return the length of the longest arithmetic subsequence in a

28. Implement strStr() # 题目 # Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "hello", needle = "ll" Output: 2 Example 2: Input: haystack = "aaaaa", needle = "bba" Output: -1 Clarification: What should we return when needle is an empty string? This is a great question to ask during an ...

# Leetcode given an array a of integers return the length of the longest arithmetic subsequence in a

原题说明. Given an array A of integers, return the length of the longest arithmetic subsequence in A.. Recall that a subsequence of A is a list A[i_1], A[i_2], …, A[i_k] with 0 <= i_1 < i_2 < ... < i_k <= A.length - 1, and that a sequence B is arithmetic if B[i+1] - B[i] are all the same value (for 0 <= i < B.length - 1).. Example 1: Input: [3,6,9,12] ...