Solution: Remove K Digits
Explore the greedy algorithm approach to remove exactly k digits from a numeric string to generate the smallest possible number. Understand how to maintain a monotonic increasing stack and efficiently remove larger digits while tracking deletions. This lesson guides you through implementing the solution with O(n) time complexity, helping you master this common interview pattern.
We'll cover the following...
We'll cover the following...
Statement
Given a string, num, that represents a non-negative integer and an integer k, remove exactly k digits from num so that the remaining digits form the smallest possible number.
Constraints:
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