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Non-overlapping Intervals

Given an array of intervals intervals where intervals[i] = [starti, endi], return the minimum number of intervals you need to remove to make the rest of the intervals...

Given an array of intervals intervals where intervals[i] = [starti, endi], return the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.

Note that intervals which only touch at a point are non-overlapping. For example, [1, 2] and [2, 3] are non-overlapping.

Example 1

Input: intervals = [[1,2],[2,3],[3,4],[1,3]]

Output: 1

Explanation: [1,3] can be removed and the rest of the intervals are non-overlapping.

Example 2

Input: intervals = [[1,2],[1,2],[1,2]]

Output: 2

Explanation: You need to remove two [1,2] to make the rest of the intervals non-overlapping.

Example 3

Input: intervals = [[1,2],[2,3]]

Output: 0

Explanation: You don't need to remove any of the intervals since they're already non-overlapping.

Constraints

  • 1 <= intervals.length <= 10^5
  • intervals[i].length == 2
  • -5 * 10^4 <= starti < endi <= 5 * 10^4

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