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Reverse Pairs Count
medium
Description
AI Assistance
Solution
Test Cases
Test Result
Submissions
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Reverse Pairs
Count
Count important reverse pairs using merge sort optimization.
Examples
Example 1
Input:
[1,2,3]
Output:
0
Example 2
Input:
[1,2,3]
Output:
0
Hints
Hint 1
Use modified merge sort.
Hint 2
Count pairs during merge when left > 2*right.
Hint 3
This counts reverse pairs efficiently.
Reverse Pairs Count
Count important reverse pairs using merge sort optimization.