q_10126_Longest_Common_Prefix.json

{
  "question": {
    "qid": "q_10126",
    "diff": 1,
    "tags": ["String"],
    "title": "Longest Common Prefix",
    "prompt": [
      "Write a function to find the longest common prefix string amongst an array of strings.",
      "If there is no common prefix, return an empty string {{ \"\" }}."
    ],
    "examples": [
      {
        "input": "[\"flower\",\"flow\",\"flight\"]",
        "output": "\"fl\"",
        "explanations": ["The longest common prefix is \"fl\"."]
      },
      {
        "input": "[\"dog\",\"racecar\",\"car\"]",
        "output": "\"\"",
        "explanations": [
          "There is no common prefix among the input strings, thus the result is an empty string \"\"."
        ]
      }
    ],
    "constraints": ["All given inputs are in lowercase letters \"a-z\"."],
    "functionArguments": ["strs"],
    "hints": [
      "Try to think of the problem in terms of matching characters from the beginning of the strings."
    ]
  },
  "testcases": [
    {
      "tid": "1",
      "input": [["flower", "flow", "flight"]],
      "expected": "fl"
    },
    { "tid": "2", "input": [["dog", "racecar", "car"]], "expected": "" }
  ],
  "submitted": 0,
  "accepted": 0,
  "questionLevel": 1
}