the square brackets is being repeated exactly k times. # Note that k is guaranteed to be a positive integer. # You may assume that the input string is always valid; No extra white spaces, # square brackets are well-formed, etc. # Furthermore, you may assume that the original data does not contain any # digits and that digits are only for those repeat numbers, k. # For example, there won't be input like 3a or 2[4]. # Examples: # s = "3[a]2[bc]", return "aaabcbc".

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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sloc)  1.


 

# Given an encoded string, return it's decoded string.

# The encoding rule is: k[encoded_string], where the encoded_string
# inside the square brackets is being repeated exactly k times.
# Note that k is guaranteed to be a positive integer.

# You may assume that the input string is always valid; No extra white spaces,
# square brackets are well-formed, etc.

# Furthermore, you may assume that the original data does not contain any
# digits and that digits are only for those repeat numbers, k.
# For example, there won't be input like 3a or 2[4].

# Examples:

# s = "3[a]2[bc]", return "aaabcbc".
# s = "3[a2[c]]", return "accaccacc".
# s = "2[abc]3[cd]ef", return "abcabccdcdcdef".

 

 

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