原文链接: https://leetcode-cn.com/problems/minimum-number-of-moves-to-seat-everyone

英文原文

There are n seats and n students in a room. You are given an array seats of length n, where seats[i] is the position of the ith seat. You are also given the array students of length n, where students[j] is the position of the jth student.

You may perform the following move any number of times:

• Increase or decrease the position of the ith student by 1 (i.e., moving the ith student from position x to x + 1 or x - 1)

Return the minimum number of moves required to move each student to a seat such that no two students are in the same seat.

Note that there may be multiple seats or students in the same position at the beginning.

 

Example 1:

Input: seats = [3,1,5], students = [2,7,4]
Output: 4
Explanation: The students are moved as follows:
- The first student is moved from from position 2 to position 1 using 1 move.
- The second student is moved from from position 7 to position 5 using 2 moves.
- The third student is moved from from position 4 to position 3 using 1 move.
In total, 1 + 2 + 1 = 4 moves were used.

Example 2:

Input: seats = [4,1,5,9], students = [1,3,2,6]
Output: 7
Explanation: The students are moved as follows:
- The first student is not moved.
- The second student is moved from from position 3 to position 4 using 1 move.
- The third student is moved from from position 2 to position 5 using 3 moves.
- The fourth student is moved from from position 6 to position 9 using 3 moves.
In total, 0 + 1 + 3 + 3 = 7 moves were used.

Example 3:

Input: seats = [2,2,6,6], students = [1,3,2,6]
Output: 4
Explanation: Note that there are two seats at position 2 and two seats at position 6.
The students are moved as follows:
- The first student is moved from from position 1 to position 2 using 1 move.
- The second student is moved from from position 3 to position 6 using 3 moves.
- The third student is not moved.
- The fourth student is not moved.
In total, 1 + 3 + 0 + 0 = 4 moves were used.

 

Constraints:

• n == seats.length == students.length
• 1 <= n <= 100
• 1 <= seats[i], students[j] <= 100

中文题目

一个房间里有 n 个座位和 n 名学生，房间用一个数轴表示。给你一个长度为 n 的数组 seats ，其中 seats[i] 是第 i 个座位的位置。同时给你一个长度为 n 的数组 students ，其中 students[j] 是第 j 位学生的位置。

你可以执行以下操作任意次：

• 增加或者减少第 i 位学生的位置，每次变化量为 1 （也就是将第 i 位学生从位置 x 移动到 x + 1 或者 x - 1）

请你返回使所有学生都有座位坐的 最少移动次数 ，并确保没有两位学生的座位相同。

请注意，初始时有可能有多个座位或者多位学生在 同一 位置。

 

示例 1：

输入：seats = [3,1,5], students = [2,7,4]
输出：4
解释：学生移动方式如下：
- 第一位学生从位置 2 移动到位置 1 ，移动 1 次。
- 第二位学生从位置 7 移动到位置 5 ，移动 2 次。
- 第三位学生从位置 4 移动到位置 3 ，移动 1 次。
总共 1 + 2 + 1 = 4 次移动。

示例 2：

输入：seats = [4,1,5,9], students = [1,3,2,6]
输出：7
解释：学生移动方式如下：
- 第一位学生不移动。
- 第二位学生从位置 3 移动到位置 4 ，移动 1 次。
- 第三位学生从位置 2 移动到位置 5 ，移动 3 次。
- 第四位学生从位置 6 移动到位置 9 ，移动 3 次。
总共 0 + 1 + 3 + 3 = 7 次移动。

示例 3：

输入：seats = [2,2,6,6], students = [1,3,2,6]
输出：4
解释：学生移动方式如下：
- 第一位学生从位置 1 移动到位置 2 ，移动 1 次。
- 第二位学生从位置 3 移动到位置 6 ，移动 3 次。
- 第三位学生不移动。
- 第四位学生不移动。
总共 1 + 3 + 0 + 0 = 4 次移动。

 

提示：

• n == seats.length == students.length
• 1 <= n <= 100
• 1 <= seats[i], students[j] <= 100

通过代码

高赞题解

由于座位和学生数相同，一个萝卜一个坑，将座位和学生位置排序后，第 $i$ 个学生可以对应第 $i$ 个座位。

由于交换任意两个学生对应的座位不会产生更少的移动次数（可以画一画，证明略），所以上述对应关系可以产生最少移动次数，累加位置之差即为答案。

func minMovesToSeat(seats, students []int) (ans int) {
	sort.Ints(seats)
	sort.Ints(students)
	for i, p := range seats {
		ans += abs(p - students[i])
	}
	return
}

func abs(x int) int {
	if x < 0 {
		return -x
	}
	return x
}

统计信息

通过次数	提交次数	AC比率
3611	4354	82.9%

提交历史

提交时间	提交结果	执行时间	内存消耗	语言