Class Solution
java.lang.Object
g1001_1100.s1003_check_if_word_is_valid_after_substitutions.Solution
public class Solution
extends java.lang.Object
1003 - Check If Word Is Valid After Substitutions.
Medium
Given a string s
, determine if it is valid.
A string s
is valid if, starting with an empty string t = ""
, you can transform t
into s
after performing the following operation any number of times:
- Insert string
"abc"
into any position int
. More formally,t
becomestleft + “abc” + tright
, wheret == tleft + tright
. Note thattleft
andtright
may be empty.
Return true
if s
is a valid string, otherwise, return false
.
Example 1:
Input: s = “aabcbc”
Output: true
Explanation: "" -> “abc” -> “aabcbc” Thus, “aabcbc” is valid.
Example 2:
Input: s = “abcabcababcc”
Output: true
Explanation: "" -> “abc” -> “abcabc” -> “abcabcabc” -> “abcabcababcc” Thus, “abcabcababcc” is valid.
Example 3:
Input: s = “abccba”
Output: false
Explanation: It is impossible to get “abccba” using the operation.
Constraints:
1 <= s.length <= 2 * 104
s
consists of letters'a'
,'b'
, and'c'
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Constructor Summary
Constructors -
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Details
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Solution
public Solution()
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Method Details
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isValid
public boolean isValid(java.lang.String s)
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