How to Solve Interleaving String Problem
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Interleaving String
Given strings s1, s2, and s3, find whether s3 is formed by an interleaving of s1 and s2. An interleaving of two strings s and t is a configuration where s and t are divided into n and m substrings res...
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Understanding the Interleaving String Problem
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Problem Statement
Given strings s1, s2, and s3, find whether s3 is formed by an interleaving of s1 and s2. An interleaving of two strings s and t is a configuration where s and t are divided into n and m substrings respectively, such that: s = s1 + s2 + ... + sn t = t1 + t2 + ... + tm |n - m| <= 1 The interleaving is s1 + t1 + s2 + t2 + s3 + t3 + ... or t1 + s1 + t2 + s2 + t3 + s3 + ... Note: a + b is the concatenation of strings a and b.
Interleaving String
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Examples
s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac"trueOne way to obtain s3 is: Split s1 into s1 = "aa" + "bc" + "c", and s2 into s2 = "dbbc" + "a". Interleaving the two splits, we get "aa" + "dbbc" + "bc" + "a" + "c" = "aadbbcbcac". Since s3 can be obtained by interleaving s1 and s2, we return true.
s1 = "aabcc", s2 = "dbbca", s3 = "aadbbbaccc"falseNotice how it is impossible to interleave s2 with any other string to obtain s3.
s1 = "", s2 = "", s3 = ""trueConstraints
0 <= s1.length, s2.length <= 1000 <= s3.length <= 200s1, s2, and s3 consist of lowercase English letters.Follow up: Could you solve it using only O(s2.length) additional memory space?How Interview Coder Helps with Leetcode Problems
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