Example: Input: S = "heeellooo" words = ["hello", "hi", "helo"] Output: 1 Explanation: We can extend "e" and "o" in the word "hello" to get "heeellooo". We can‘t extend "helo" to get "heeellooo" because the group "ll" is not size 3 or more.
class Solution { public int expressiveWords(String S, String[] words) { int res = 0; for (String word: words) { if (stretchy(S, word)) { res += 1; } } return res; } private boolean stretchy(String S, String word) { int i = 0, j = 0; while (i < S.length() && j < word.length()) { if (S.charAt(i) != word.charAt(j)) { return false; } int lenS = getRepeated(i, S); int lenWord = getRepeated(j, word); if (lenS < 3 && lenWord != lenS || lenS >= 3 && lenS < lenWord) { return false; } i += lenS; j += lenWord; } return i == S.length() && j == word.length(); } private int getRepeated(int index, String word) { int i = index; while (i < word.length() && word.charAt(i) == word.charAt(index)) { i += 1; } return i - index; } }
原文：https://www.cnblogs.com/xuanlu/p/12294355.html