Practice Arithmetic Slices II - Subsequence
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Arithmetic Slices II - Subsequence
Given an integer array nums, return the number of all the arithmetic subsequences of nums. A sequence of numbers is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the same. A subsequence of an array is a sequence that can be formed by removing some elements (possibly none) of the array. The test cases are generated so that the answer fits in 32-bit integer.
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Understanding the Arithmetic Slices II - Subsequence Problem
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Problem Statement
Given an integer array nums, return the number of all the arithmetic subsequences of nums. A sequence of numbers is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the same. A subsequence of an array is a sequence that can be formed by removing some elements (possibly none) of the array. The test cases are generated so that the answer fits in 32-bit integer.
Source: Arithmetic Slices II - Subsequence on LeetCode. Use the original task for its coding environment and submissions.
Arithmetic Slices II - Subsequence
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Examples
# Example 1
nums = [2,4,6,8,10]
7
# Example 2
nums = [7,7,7,7,7]
16
Constraints
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