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Four Sum Quadruplets
medium
Description
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Solution
Test Cases
Test Result
Submissions
Canvas
Four Sum
Quadruplets
Find all unique quadruplets that sum to target using sorting and two pointers.
Examples
Example 1
Input:
[1,2,3]
Output:
[]
Example 2
Input:
[1,2,3]
Output:
[]
Hints
Hint 1
Sort the array first.
Hint 2
Use two outer loops and two-pointer technique for inner loops.
Hint 3
Skip duplicates at each level.
Four Sum Quadruplets
Find all unique quadruplets that sum to target using sorting and two pointers.