Package g1601_1700.s1630_arithmetic_subarrays

Class Solution

java.lang.Object

g1601_1700.s1630_arithmetic_subarrays.Solution

public class Solution
extends Object

1630 - Arithmetic Subarrays\. Medium A sequence of numbers is called **arithmetic** if it consists of at least two elements, and the difference between every two consecutive elements is the same. More formally, a sequence `s` is arithmetic if and only if `s[i+1] - s[i] == s[1] - s[0]` for all valid `i`. For example, these are **arithmetic** sequences: 1, 3, 5, 7, 9 7, 7, 7, 7 3, -1, -5, -9 The following sequence is not **arithmetic**: 1, 1, 2, 5, 7 You are given an array of `n` integers, `nums`, and two arrays of `m` integers each, `l` and `r`, representing the `m` range queries, where the ith query is the range `[l[i], r[i]]`. All the arrays are **0-indexed**. Return _a list of_ `boolean` _elements_ `answer`_, where_ `answer[i]` _is_ `true` _if the subarray_ `nums[l[i]], nums[l[i]+1], ... , nums[r[i]]` _can be **rearranged** to form an **arithmetic** sequence, and_ `false` _otherwise._ **Example 1:** **Input:** nums = `[4,6,5,9,3,7]`, l = `[0,0,2]`, r = `[2,3,5]` **Output:** `[true,false,true]` **Explanation:** In the 0^th query, the subarray is [4,6,5]. This can be rearranged as [6,5,4], which is an arithmetic sequence. In the 1^st query, the subarray is [4,6,5,9]. This cannot be rearranged as an arithmetic sequence. In the 2^nd query, the subarray is `[5,9,3,7]. This` can be rearranged as `[3,5,7,9]`, which is an arithmetic sequence. **Example 2:** **Input:** nums = [-12,-9,-3,-12,-6,15,20,-25,-20,-15,-10], l = [0,1,6,4,8,7], r = [4,4,9,7,9,10] **Output:** [false,true,false,false,true,true] **Constraints:** * `n == nums.length` * `m == l.length` * `m == r.length` * `2 <= n <= 500` * `1 <= m <= 500` * `0 <= l[i] < r[i] < n` * -105 <= nums[i] <= 105

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
List<Boolean>	checkArithmeticSubarrays(int[] nums, int[] l, int[] r)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

checkArithmeticSubarrays

public List<Boolean> checkArithmeticSubarrays(int[] nums,
 int[] l,
 int[] r)