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[ 문제내용 ] Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123 Output: 321 Example 2:Input: -123 Output: -321 Example 3:Input: 120 Output: 21 Note: Assume we are dealing with an environment which could only store integers within the 32-bit signed integer range: [−231, 231 − 1]. For the purpose of this problem, assume that your function returns 0 when the reversed integ..