{"id":1177,"date":"2022-05-28T20:31:18","date_gmt":"2022-05-28T12:31:18","guid":{"rendered":"https:\/\/sanlangcode.com\/?p=1177"},"modified":"2022-05-28T20:31:18","modified_gmt":"2022-05-28T12:31:18","slug":"hj65-%e6%9f%a5%e6%89%be%e4%b8%a4%e4%b8%aa%e5%ad%97%e7%ac%a6%e4%b8%b2ab%e4%b8%ad%e7%9a%84%e6%9c%80%e9%95%bf%e5%85%ac%e5%85%b1%e5%ad%90%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/sanlangcode.com\/index.php\/2022\/05\/28\/hj65-%e6%9f%a5%e6%89%be%e4%b8%a4%e4%b8%aa%e5%ad%97%e7%ac%a6%e4%b8%b2ab%e4%b8%ad%e7%9a%84%e6%9c%80%e9%95%bf%e5%85%ac%e5%85%b1%e5%ad%90%e4%b8%b2\/","title":{"rendered":"HJ65 \u67e5\u627e\u4e24\u4e2a\u5b57\u7b26\u4e32a,b\u4e2d\u7684\u6700\u957f\u516c\u5171\u5b50\u4e32"},"content":{"rendered":"\n

\u63cf\u8ff0<\/h2>\n\n\n\n

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\u6570\u636e\u8303\u56f4\uff1a\u5b57\u7b26\u4e32\u957f\u5ea61\\le length \\le300 \\1\u2264l<\/em>e<\/em>n<\/em>g<\/em>t<\/em>h<\/em>\u2264300 \u8fdb\u9636\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\uff1aO(n^3)\\O<\/em>(n<\/em>3) \uff0c\u7a7a\u95f4\u590d\u6742\u5ea6\uff1aO(n)\\O<\/em>(n<\/em>) <\/p>\n\n\n\n

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abcdefghijklmnop\nabcsafjklmnopqrstuvw<\/pre>\n\n\n\n
\u8f93\u51fa\uff1a<\/p>\n\n\n\n
jklmnop<\/pre>\n\n\n\n
import java.util.*;\npublic class Main{\n    public static void main(String[]args){\n        Scanner sc=new Scanner(System.in);\n        while(sc.hasNext()){\n            String s1=sc.nextLine();\n            String s2=sc.nextLine();\n            System.out.println(longString(s1,s2));\n        }\n    }\n    \n    \/\/ \u52a8\u6001\u89c4\u5212\n    public static String longString(String str1, String str2) {\n        String temp = \"\";\n        \/\/ \u4fdd\u8bc1str1\u662f\u8f83\u77ed\u5b57\u7b26\u4e32\n        if (str1.length() > str2.length()) {\n            temp = str1;\n            str1 = str2;\n            str2 = temp;\n        }\n        int m = str1.length() + 1;\n        int n = str2.length() + 1;\n        \/\/ \u8868\u793a\u5728\u8f83\u77ed\u5b57\u7b26\u4e32str1\u4ee5\u7b2ci\u4e2a\u5b57\u7b26\u7ed3\u5c3e\uff0cstr2\u4e2d\u4ee5\u7b2cj\u4e2a\u5b57\u7b26\u7ed3\u5c3e\u65f6\u7684\u516c\u5171\u5b50\u4e32\u957f\u5ea6\u3002\n        int[][] dp = new int[m][n];\n        \/\/ \u5339\u914d\u5b57\u7b26\uff0c\u5e76\u8bb0\u5f55\u6700\u5927\u503c\u7684str1\u7684\u7ed3\u5c3e\u4e0b\u6807\n        int max = 0;\n        int index = 0;\n        \/\/ \u4ece\u5de6\u5411\u53f3\u9012\u63a8\uff0ci\u4e3a\u77ed\u5b57\u7b26\u4e32str1\u7684\u7ed3\u5c3e\u7d22\u5f15\uff0cj\u4e3astr2\u7684\u7ed3\u5c3e\u7d22\u5f15\n        for (int i=1; i < m; i++) {\n            for (int j=1; j < n; j++) {\n                if (str1.charAt(i-1) == str2.charAt(j-1)) {\n                    \/\/ \u76f8\u7b49\u5219\u8ba1\u6570\n                    dp[i][j] = dp[i-1][j-1] + 1;\n                    \/\/ \u4e0d\u65ad\u66f4\u65b0\u53d8\u91cf\n                    if (dp[i][j] > max) {\n                        max = dp[i][j];\n                        index = i;\n                    }\n                }\n            }\n        }\n        \/\/ \u622a\u53d6\u6700\u5927\u516c\u5171\u5b50\u4e32\n        return str1.substring(index-max, index);\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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