q_10125_Reverse_Integer.json

{
  "question": {
    "qid": "q_10125",
    "diff": 2,
    "tags": ["Math"],
    "title": "Reverse Integer",
    "prompt": [
      "Given a {{ 32-bit }} signed integer, reverse digits of an integer.",
      "Note:",
      "Assume we are dealing with an environment that could only store integers within the {{ 32-bit }} signed integer range: {{ [-2^31,  2^31 - 1] }}. For the purpose of this problem, assume that your function returns {{ 0 }} when the reversed integer overflows."
    ],
    "examples": [
      {
        "input": "123",
        "output": "321",
        "explanations": ["The input integer is 123. Reverse it and return 321."]
      },
      {
        "input": "-123",
        "output": "-321",
        "explanations": [
          "The input integer is -123. Reverse it and return -321."
        ]
      },
      {
        "input": "120",
        "output": "21",
        "explanations": [
          "The input integer is 120. Reverse it and return 21. Note that the reversed integer has no leading zeroes."
        ]
      }
    ],
    "constraints": ["\u22122^31 <= x <= 2^31 \u2212 1"],
    "functionArguments": ["x"],
    "hints": [
      "To reverse the integer, you can convert it to a string first.",
      "Handle the negative sign if the integer is negative.",
      "Check for integer overflow while reversing."
    ]
  },
  "testcases": [
    { "tid": "1", "input": [123], "expected": 321 },
    { "tid": "2", "input": [-123], "expected": -321 },
    { "tid": "3", "input": [120], "expected": 21 },
    { "tid": "4", "input": [0], "expected": 0 }
  ],
  "submitted": 0,
  "accepted": 0,
  "questionLevel": 5
}