Solution: Remove K Digits
Explore how to apply a greedy algorithm with a monotonic stack to remove k digits from a numeric string, minimizing the resulting number. Understand the step-by-step process, the importance of maintaining an increasing sequence, and how the approach guarantees an optimal solution. This lesson equips you to solve similar digit removal and optimization problems with O(n) time complexity.
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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