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Allocate Mailboxes

Given the array houses where houses[i] is the location of the ith house along a street and an integer k, allocate k mailboxes in the street.

Given the array houses where houses[i] is the location of the ith house along a street and an integer k, allocate k mailboxes in the street.

Return the minimum total distance between each house and its nearest mailbox.

The test cases are generated so that the answer fits in a 32-bit integer.

Allocate Mailboxes diagram

Example 1

Input: houses = [1,4,8,10,20], k = 3

Output: 5

Explanation: Allocate mailboxes in position 3, 9 and 20. Minimum total distance from each houses to nearest mailboxes is |3-1| + |4-3| + |9-8| + |10-9| + |20-20| = 5

Example 2

Input: houses = [2,3,5,12,18], k = 2

Output: 9

Explanation: Allocate mailboxes in position 3 and 14. Minimum total distance from each houses to nearest mailboxes is |2-3| + |3-3| + |5-3| + |12-14| + |18-14| = 9.

Constraints

  • 1 <= k <= houses.length <= 100
  • 1 <= houses[i] <= 10^4
  • All the integers of houses are unique.

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