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Quick Summary
Rearrange an integer array so all even numbers appear before odd numbers.
Return the minimum number of swaps required to achieve this partition.
The relative order within each parity group does not matter.
What This Tests
Array partitioning and logical reasoning
Greedy mathematical insight for optimization
Parity checks and boundary condition handling
Complexity analysis under large input constraints
Common Patterns
Two Pointers
Greedy
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Python3
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Input
nums =
Output
Expected
