- Difficulty: Medium
- Tags: LeetCode, Medium, Depth-First Search, Breadth-First Search, Union Find, Array, Hash Table, String, leetcode-737, O(n + p), O(p)
Problem
We can represent a sentence as an array of words, for example, the sentence "I am happy with leetcode" can be represented as arr = ["I","am",happy","with","leetcode"].
Given two sentences sentence1 and sentence2 each represented as a string array and given an array of string pairs similarPairs where similarPairs[i] = [xi, yi] indicates that the two words xi and yi are similar.
Return true if sentence1 and sentence2 are similar, or false if they are not similar.
Two sentences are similar if:
- They have the same length (i.e., the same number of words)
sentence1[i]andsentence2[i]are similar.
Notice that a word is always similar to itself, also notice that the similarity relation is transitive. For example, if the words a and b are similar, and the words b and c are similar, then a and c are similar.
Example 1:
Input: sentence1 = ["great","acting","skills"], sentence2 = ["fine","drama","talent"], similarPairs = [["great","good"],["fine","good"],["drama","acting"],["skills","talent"]] Output: true Explanation: The two sentences have the same length and each word i of sentence1 is also similar to the corresponding word in sentence2.
Example 2:
Input: sentence1 = ["I","love","leetcode"], sentence2 = ["I","love","onepiece"], similarPairs = [["manga","onepiece"],["platform","anime"],["leetcode","platform"],["anime","manga"]] Output: true Explanation: "leetcode" --> "platform" --> "anime" --> "manga" --> "onepiece". Since "leetcode is similar to "onepiece" and the first two words are the same, the two sentences are similar.
Example 3:
Input: sentence1 = ["I","love","leetcode"], sentence2 = ["I","love","onepiece"], similarPairs = [["manga","hunterXhunter"],["platform","anime"],["leetcode","platform"],["anime","manga"]] Output: false Explanation: "leetcode" is not similar to "onepiece".
Constraints:
1 <= sentence1.length, sentence2.length <= 10001 <= sentence1[i].length, sentence2[i].length <= 20sentence1[i]andsentence2[i]consist of lower-case and upper-case English letters.0 <= similarPairs.length <= 2000similarPairs[i].length == 21 <= xi.length, yi.length <= 20xiandyiconsist of English letters.