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roblem 3: method isColUnique [25 pts] * Given a 2D array of size 9x9 that only contains values from 1 to 9, and an integer
roblem 3: method isColUnique [25 pts]
* Given a 2D array of size 9x9 that only contains values from 1 to 9, and an integer n < 9,
* design a method that checks whether the elements of column at index n of A
* are all different.
* Your method returns a boolean value.
eclipse java code
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