DSA Level 2 Data Structures Stacks Check If Word Is Valid After Insertion

Check If Word Is Valid After Insertion

medium

1. You are given a string s determine if it is valid or not.
2. A valid string is a string that can be created by inserting abc at any index any number of times.

Example:
aabcbc can be created 
"" -&gt; "&lt;span style="text-decoration: underline;"&gt;abc&lt;/span&gt;" -&gt; "a&lt;span style="text-decoration: underline;"&gt;abc&lt;/span&gt;bc"

while it is impossible to create abccba.

Input Format

Input is managed for you

Output Format

Output is managed for you

Constraints

1: s consists of letters 'a', 'b', and 'c' only.

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input

aabcbc

Output

true

Max-stack

Moving Average From Data Stream

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