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Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2.
For example,
Given:
s1 = "aabcc",
s2 = "dbbca",
When s3 = "aadbbcbcac", return true.
When s3 = "aadbbbaccc", return false.
解题思路：
DP问题，JAVA实现如下：
static public boolean isInterleave(String s1, String s2, String s3) {
if (s1.length() + s2.length() != s3.length())
return false;
boolean[] dp = new boolean[s2.length() + 1];
dp[0] = true;
for (int j = 1; j <= s2.length(); j++)
dp[j] = dp[j - 1] && s2.charAt(j - 1) == s3.charAt(j - 1);
for (int i = 1; i <= s1.length(); i++) {
dp[0] = dp[0] && s1.charAt(i - 1) == s3.charAt(i - 1);
for (int j = 1; j <= s2.length(); ++j) {
dp[j] = (dp[j] && s1.charAt(i - 1) == s3.charAt(i + j - 1))
|| (dp[j - 1] && s2.charAt(j - 1) == s3.charAt(i + j
- 1));
}
}
return dp[s2.length()];
}
Java for LeetCode 097 Interleaving String
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原文地址：http://www.cnblogs.com/tonyluis/p/4520807.html
