Solution: Remove K Digits
Understand how to apply a greedy approach with a monotonic increasing stack to remove exactly k digits from a numeric string, minimizing the resulting number. Explore step-by-step logic to efficiently implement this algorithm with linear time complexity.
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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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