{ "data": { "question": { "questionId": "2757", "questionFrontendId": "2719", "boundTopicId": null, "title": "Count of Integers", "titleSlug": "count-of-integers", "content": "

You are given two numeric strings num1 and num2 and two integers max_sum and min_sum. We denote an integer x to be good if:

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Return the number of good integers. Since the answer may be large, return it modulo 109 + 7.

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Note that digit_sum(x) denotes the sum of the digits of x.

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Example 1:

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\nInput: num1 = "1", num2 = "12", min_sum = 1, max_sum = 8\nOutput: 11\nExplanation: There are 11 integers whose sum of digits lies between 1 and 8 are 1,2,3,4,5,6,7,8,10,11, and 12. Thus, we return 11.\n
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Example 2:

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\nInput: num1 = "1", num2 = "5", min_sum = 1, max_sum = 5\nOutput: 5\nExplanation: The 5 integers whose sum of digits lies between 1 and 5 are 1,2,3,4, and 5. Thus, we return 5.\n
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Constraints:

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Compiled with clang 11 using the latest C++ 20 standard.

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Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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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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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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C# 10 with .NET 6 runtime

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Node.js 16.13.2.

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Ruby 3.1

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Python 3.10.

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Scala 2.13.7.

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Kotlin 1.9.0.

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Rust 1.58.1

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TypeScript 5.1.6, Node.js 16.13.2.

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