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frew@mclean.com > count2s
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Given an array of ints, return the number of two’s in the array.


count2s([2, 3, 2, 2, 4, 2]) → 4
count2s([2, 3, 2, 2, 4, 2, 2]) → 5
count2s([1, 2, 3, 4]) → 1

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public int count2s(int[] nums) { }

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