97. Interleaving String

Description

Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2. Example 1:

Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbcbcac"
Output: true

Example 2:

Input: s1 = "aabcc", s2 = "dbbca", s3 = "aadbbbaccc"
Output: false

Tags: Math, String

题意

给定三个字符串 s1, s2, s3, 验证 s3 是否是由 s1 和 s2 交错组成的。

题解

思路1

>

func isInterleave2(s1 string, s2 string, s3 string) bool {
    if len(s3) != len(s1)+len(s2) {
        return false
    }

    dp := make([][]bool, len(s1)+1)
    for i := 0; i < len(s1)+1; i++ {
        dp[i] = make([]bool, len(s2)+1)
    }

    dp[0][0] = true
    for i := 1; i < len(s1)+1; i++ {
        if s1[i-1] == s3[i-1] {
            dp[i][0] = dp[i-1][0]
        }
    }

    for j := 1; j < len(s2)+1; j++ {
        if s2[j-1] == s3[j-1] {
            dp[0][j] = dp[0][j-1]
        }
    }
    for i := 1; i < len(s1)+1; i++ {
        for j := 1; j < len(s2)+1; j++ {
            dp[i][j] = (s1[i-1] == s3[i+j-1] && dp[i-1][j]) || (s2[j-1] == s3[i+j-1] && dp[i][j-1])
        }
    }
    return dp[len(s1)][len(s2)]
}

思路2

思路2 ```go

```

结语

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