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Add Border

Given a rectangular matrix of characters, add a border of asterisks(*) to it.

Example:

  • For 
    picture = [
  "abc",
  "ded"
]
  • The output should be 
    addBorder(picture) = [
  "*****",
  "*abc*",
  "*ded*",
  "*****"
]

Input/Output:

  • [execution time limit] 5 seconds (ts)

  • [input] array.string picture

    • Guaranteed constraints:
      • $1 \le picture.length \le 100$
      • $1 \le picture[i].length \le 100$

  • [output] array.string

    • The same matrix of characters, framed with a border of asterisks of width 1.

Solution: