leetcode中等97交错字符串

Posted 2022-09-23 qq_40707462

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