g0001_0100.s0097_interleaving_string

Class Solution

java.lang.Object

g0001_0100.s0097_interleaving_string.Solution

public class Solution
extends Object

97 - Interleaving String.

Medium

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 they are divided into non-empty substrings 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.

Example 1:

Input: s1 = “aabcc”, s2 = “dbbca”, s3 = “aadbbcbcac”

Output: true

Example 2:

Input: s1 = “aabcc”, s2 = “dbbca”, s3 = “aadbbbaccc”

Output: false

Example 3:

Input: s1 = "", s2 = "", s3 = ""

Output: true

Constraints:

• 0 <= s1.length, s2.length <= 100
• 0 <= s3.length <= 200
• s1, s2, and s3 consist of lowercase English letters.

Follow up: Could you solve it using only O(s2.length) additional memory space?

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	isInterleave(String s1, String s2, String s3)
boolean	isInterleave(String s1, String s2, String s3, int i1, int i2, int i3, Boolean[][] cache)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

isInterleave

public boolean isInterleave(String s1,
                            String s2,
                            String s3)

isInterleave

public boolean isInterleave(String s1,
                            String s2,
                            String s3,
                            int i1,
                            int i2,
                            int i3,
                            Boolean[][] cache)