Package g0401_0500.s0413_arithmetic_slices

Class Solution

  • public class Solution
extends Object
    413 - Arithmetic Slices.

    Medium

    An integer array is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elements is the same.

    • For example, [1,3,5,7,9], [7,7,7,7], and [3,-1,-5,-9] are arithmetic sequences.

    Given an integer array nums, return the number of arithmetic subarrays of nums.

    A subarray is a contiguous subsequence of the array.

    Example 1:

    Input: nums = [1,2,3,4]

    Output: 3

    Explanation: We have 3 arithmetic slices in nums: [1, 2, 3], [2, 3, 4] and [1,2,3,4] itself.

    Example 2:

    Input: nums = [1]

    Output: 0

    Constraints:

    • 1 <= nums.length <= 5000
    • -1000 <= nums[i] <= 1000

    • Constructor Detail

      • Solution

        public Solution()

    • Method Detail

      • numberOfArithmeticSlices

        public int numberOfArithmeticSlices​(int[] nums)