{ "data": { "question": { "questionId": "3847", "questionFrontendId": "3551", "categoryTitle": "Algorithms", "boundTopicId": 3677777, "title": "Minimum Swaps to Sort by Digit Sum", "titleSlug": "minimum-swaps-to-sort-by-digit-sum", "content": "

You are given an array nums of distinct positive integers. You need to sort the array in increasing order based on the sum of the digits of each number. If two numbers have the same digit sum, the smaller number appears first in the sorted order.

\n\n

Return the minimum number of swaps required to rearrange nums into this sorted order.

\n\n

A swap is defined as exchanging the values at two distinct positions in the array.

\n\n

 

\n

Example 1:

\n\n
\n

Input: nums = [37,100]

\n\n

Output: 1

\n\n

Explanation:

\n\n\n
\n\n

Example 2:

\n\n
\n

Input: nums = [22,14,33,7]

\n\n

Output: 0

\n\n

Explanation:

\n\n\n
\n\n

Example 3:

\n\n
\n

Input: nums = [18,43,34,16]

\n\n

Output: 2

\n\n

Explanation:

\n\n\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "数位和排序需要的最小交换次数", "translatedContent": "

给你一个由 互不相同 的正整数组成的数组 nums,需要根据每个数字的数位和(即每一位数字相加求和)按 升序 对数组进行排序。如果两个数字的数位和相等,则较小的数字排在前面。

\n\n

返回将 nums 排列为上述排序顺序所需的 最小 交换次数。

\n\n

一次 交换 定义为交换数组中两个不同位置的值。

\n\n

 

\n\n

示例 1:

\n\n
\n

输入: nums = [37,100]

\n\n

输出: 1

\n\n

解释:

\n\n\n
\n\n

示例 2:

\n\n
\n

输入: nums = [22,14,33,7]

\n\n

输出: 0

\n\n

解释:

\n\n\n
\n\n

示例 3:

\n\n
\n

输入: nums = [18,43,34,16]

\n\n

输出: 2

\n\n

解释:

\n\n\n
\n\n

 

\n\n

提示:

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Then, map each original value to its index in the sorted array.", "Now, the problem reduces to finding the minimum number of swaps to sort this mapped array. The answer is n - number_of_cycles in the permutation." ], "solution": null, "status": null, "sampleTestCase": "[37,100]", "metaData": "{\n \"name\": \"minSwaps\",\n \"params\": [\n {\n \"name\": \"nums\",\n \"type\": \"integer[]\"\n }\n ],\n \"return\": {\n \"type\": \"integer\"\n }\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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