Non-overlapping Intervals

**Problem Statement:** Given the required input arguments, write an efficient algorithm to solve the **Non-overlapping Intervals** problem. Implement the required logic as specified by standard definitions for this classic algorithmic challenge. **Hint / Expected Approach:** Sort by end; greedily keep most compatible **Edge Cases to Consider:** - (1) No overlaps - (2) All overlap - (3) Intervals sharing just an endpoint

Examples

Example 1

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

Output: 1

Explanation: Remove `[1,3]`

Example 2

Input: [[1,2],[1,2],[1,2]]

Output: 2

Explanation: Keep one

Example 3

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

Output: 0

Explanation: No overlap

Constraints

▪Input arguments are within valid ranges
▪Optimize for execution speed
▪Handle null/empty inputs gracefully

Watch Out For Edge Cases

▪No overlaps
▪All overlap
▪Intervals sharing just an endpoint

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