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Given a non-empty array of ints, return an int value representing the first element inside the array which is not duplicate. You can always assume there is at least one element inside the array which is not duplicate. getSingleNum([1]) → 1 getSingleNum([3, 2, 2]) → 3 getSingleNum([1, 20, 20, 1, 4, 5, 20]) → 4 ...Save, Compile, Run (ctrl-enter) |
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Difficulty: 240
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