97 - Interleaving String

Problem

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

Code

public class Solution {
    public boolean isInterleave(String s1, String s2, String s3) {
        int l1 = s1.length();
        int l2 = s2.length();
        int l3 = s3.length();
        if (l1 == 0 && l2 == 0 && l3 == 0) {
            return true;
        }
        if (l1 + l2 != l3) {
            return false;
        }
        if (l1 == 0) {
            return s3.compareTo(s2) == 0;
        }
        boolean[][] dp = new boolean[l3 + 1][l1 + 1];
        dp[0][0] = true;
        for (int i = 1; i <= l3; ++i) {
            for (int j = 0; j <= l1 && j <= i; ++j) {
                if ((j > 0 && dp[i - 1][j - 1] && s3.charAt(i - 1) == s1.charAt(j - 1))
                    || (i - j >= 1 && i - j <= l2 && dp[i - 1][j] && s3.charAt(i - 1) == s2.charAt(i - j - 1))) {
                    //System.out.println(i + " " + j);
                    dp[i][j] = true;
                }
            }
        }
        return dp[l3][l1];
    }
}

Link: https://leetcode.com/problems/interleaving-string/

标签：String,s3,s2,Interleaving,int,&&,l1,s1,97
来源： https://blog.csdn.net/LvShuiLanTian/article/details/95477677