{ "data": { "question": { "questionId": "402", "questionFrontendId": "402", "boundTopicId": null, "title": "Remove K Digits", "titleSlug": "remove-k-digits", "content": "

Given string num representing a non-negative integer num, and an integer k, return the smallest possible integer after removing k digits from num.

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Example 1:

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\nInput: num = "1432219", k = 3\nOutput: "1219"\nExplanation: Remove the three digits 4, 3, and 2 to form the new number 1219 which is the smallest.\n
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Example 2:

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\nInput: num = "10200", k = 1\nOutput: "200"\nExplanation: Remove the leading 1 and the number is 200. Note that the output must not contain leading zeroes.\n
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Example 3:

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\nInput: num = "10", k = 2\nOutput: "0"\nExplanation: Remove all the digits from the number and it is left with nothing which is 0.\n
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Constraints:

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Most standard library headers are already included automatically for your convenience.

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OpenJDK 17 . Java 8 features such as lambda expressions and stream API can be used.

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Most standard library headers are already included automatically for your convenience.

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Python 2.7.12.

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For Map/TreeMap data structure, you may use sortedcontainers library.

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Most standard library headers are already included automatically for your convenience.

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For hash table operations, you may use uthash. \\\"uthash.h\\\" is included by default. Below are some examples:

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3. Deleting an item in a hash:\\r\\n

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C# 10 with .NET 6 runtime

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Your code is compiled with debug flag enabled (/debug).

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Node.js 16.13.2.

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Python 3.10.

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TypeScript 4.5.4, Node.js 16.13.2.

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