Grokking Data Structures & Algorithms for Coding Interviews
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Problem 4: Next Greater Element (easy)
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Problem Statement

Examples

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Problem Statement

Given an array, print the Next Greater Element (NGE) for every element.

The Next Greater Element for an element x is the first greater element on the right side of x in the array.

Elements for which no greater element exist, consider the next greater element as -1.

Examples

Example 1:

 Input: [4, 5, 2, 25]
 Output: [5, 25, 25, -1]

Example 1:

 Input: [13, 7, 6, 12]
 Output: [-1, 12, 12, -1]

Example 1:

 Input: [1, 2, 3, 4, 5]
 Output: [2, 3, 4, 5, -1]

Constraints:

  • 1 <= arr.length <= 10<sup>4</sup>
  • -10<sup>9</sup> <= arr[i] <= 10<sup>9</sup>

Try it yourself

Try solving this question here:

Python3
Python3
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On this page

Problem Statement

Examples

Try it yourself