Package g0901_1000.s0941_valid_mountain_array

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    941 - Valid Mountain Array.

    Easy

    Given an array of integers arr, return true if and only if it is a valid mountain array.

    Recall that arr is a mountain array if and only if:

    • arr.length >= 3

    • There exists some i with 0 < i < arr.length - 1 such that:

    Example 1:

    Input: arr = 2,1

    Output: false

    Example 2:

    Input: arr = 3,5,5

    Output: false

    Example 3:

    Input: arr = 0,3,2,1

    Output: true

    Constraints:

    • <code>1 <= arr.length <= 10<sup>4</sup></code>

    • <code>0 <= arri<= 10<sup>4</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Boolean validMountainArray(IntArray arr)

      • Methods inherited from class java.lang.Object

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