The 4Sum problem is an extension of the well-known 2-Sum and 3-Sum problems, where the goal is to find four numbers in an array that sum up to a given target. It’s a common problem in algorithmic challenges and is used to test understanding of array manipulation, sorting, and optimization techniques.
The following are practice problems based on 4Sum.
- Check for Quadruple
- Find any quadruplet having given sum
- Count Quadruples with Given sum
- All Quadruples with Given Sum
- All Distinct Quadruples with Given Sum
- Quadruplet Sum Closest to Target
- Count quadruples of given type
- Count quadruples from four sorted arrays
- Count of quadruplets with given Sum from 4 Arrays
- Maximum product quadruple
- Count Quadruples with Pair wise same Square Sum
- Count all Quadruples from four arrays with given XOR
- Quadruples for Sum and Product of Integers with XOR
- Number of Maximum Product Quadruples