Solution: Remove K Digits
Understand how to apply a greedy technique using a monotonic stack to remove exactly k digits from a numeric string to create the smallest possible number. Learn the step-by-step approach to scan digits, remove larger ones first, and manage remaining deletions efficiently, with a time complexity of O(n).
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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