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Problem 4: Next Greater Element (easy)

Problem Statement

Given an array, return the Next Greater Element (NGE) for every element, as an array of the same length.

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 2:

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

Example 3:

 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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