Challenge: Next Greater Element Using a Stack

Try to solve the Next Greater Element Using a Stack problem.

We'll cover the following


Implement a next_greater_element() function that takes a list of integers, lst, as input and returns the next greater number for every element in the list.

The next greater number for a number lst[i] is the first number to its right that is greater than lst[i]. If no such number exists, return -1 for this number.


  • 11 \leq lst.length 103\leq 10^{3}
  • 00 \leq lst[i] 103\leq 10^{3}


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