648. 单词替换-蒲公英云

648. 单词替换

心已赠人 2023-10-04 08:14 119阅读 0赞

在英语中，我们有一个叫做 词根(root)的概念，它可以跟着其他一些词组成另一个较长的单词——我们称这个词为 继承词(successor)。例如，词根an，跟随着单词 other(其他)，可以形成新的单词 another(另一个)。

现在，给定一个由许多词根组成的词典和一个句子。你需要将句子中的所有继承词用词根替换掉。如果继承词有许多可以形成它的词根，则用最短的词根替换它。

你需要输出替换之后的句子。

示例 1：

输入：dictionary = ["cat","bat","rat"], sentence = "the cattle was rattled by the battery"
输出："the cat was rat by the bat"

示例 2：

输入：dictionary = ["a","b","c"], sentence = "aadsfasf absbs bbab cadsfafs"
输出："a a b c"

示例 3：

输入：dictionary = ["a", "aa", "aaa", "aaaa"], sentence = "a aa a aaaa aaa aaa aaa aaaaaa bbb baba ababa"
输出："a a a a a a a a bbb baba a"

示例 4：

输入：dictionary = ["catt","cat","bat","rat"], sentence = "the cattle was rattled by the battery"
输出："the cat was rat by the bat"

示例 5：

输入：dictionary = ["ac","ab"], sentence = "it is abnormal that this solution is accepted"
输出："it is ab that this solution is ac"

提示：

1 <= dictionary.length <= 1000
1 <= dictionary[i].length <= 100
dictionary[i] 仅由小写字母组成。
1 <= sentence.length <= 10^6
sentence 仅由小写字母和空格组成。
sentence 中单词的总量在范围 [1, 1000] 内。
sentence 中每个单词的长度在范围 [1, 1000] 内。
sentence 中单词之间由一个空格隔开。

sentence 没有前导或尾随空格。

package Solution648;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

class Solution {

public String replaceWords(List<String> dictionary, String sentence) {
    String arr[] = sentence.split("\\s+");
    for (int j = 0; j < arr.length; j++) {
        for (int i = 0; i < dictionary.size(); i++) {
            // System.out.println(dictionary.get(i) + "(.*)");
            arr[j] = arr[j].replaceAll("^" + dictionary.get(i) + "(.*)", dictionary.get(i));
        }
    }
    // System.out.println(Arrays.toString(arr));
    String out = "";
    for (int j = 0; j < arr.length; j++) {
        out = out + arr[j] + " ";
    }
    return out.trim();
}
public static void main(String[] args) {
    Solution sol = new Solution();
    List<String> dictionary = new ArrayList<String>();
    dictionary.add("a");
    dictionary.add("aa");
    dictionary.add("aaa");
    dictionary.add("aaaa");
    String sentence = "a aa a aaaa aaa aaa aaa aaaaaa bbb baba ababa";
    System.out.println(sol.replaceWords(dictionary, sentence));
}