_824.java

package com.fishercoder.solutions;

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

/**
 * 824. Goat Latin
 *
 * A sentence S is given, composed of words separated by spaces. Each word consists of lowercase and uppercase letters only.
 *
 * We would like to convert the sentence to "Goat Latin" (a made-up language similar to Pig Latin.)
 *
 * The rules of Goat Latin are as follows:
 *
 *     If a word begins with a vowel (a, e, i, o, or u), append "ma" to the end of the word.
 *     For example, the word 'apple' becomes 'applema'.
 *
 *     If a word begins with a consonant (i.e. not a vowel), remove the first letter and append it to the end, then add "ma".
 *     For example, the word "goat" becomes "oatgma".
 *
 *     Add one letter 'a' to the end of each word per its word index in the sentence, starting with 1.
 *     For example, the first word gets "a" added to the end, the second word gets "aa" added to the end and so on.
 *
 * Return the final sentence representing the conversion from S to Goat Latin.
 *
 * Example 1:
 *
 * Input: "I speak Goat Latin"
 * Output: "Imaa peaksmaaa oatGmaaaa atinLmaaaaa"
 *
 * Example 2:
 *
 * Input: "The quick brown fox jumped over the lazy dog"
 * Output: "heTmaa uickqmaaa rownbmaaaa oxfmaaaaa umpedjmaaaaaa overmaaaaaaa hetmaaaaaaaa azylmaaaaaaaaa ogdmaaaaaaaaaa"
 *
 * Notes:
 *
 *     S contains only uppercase, lowercase and spaces. Exactly one space between each word.
 *     1 <= S.length <= 100.
 */
public class _824 {

  public static class Solution1 {
    public String toGoatLatin(String S) {
      StringBuilder sb = new StringBuilder();
      Set<Character> vowels =
          new HashSet(Arrays.asList('a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'));
      String[] words = S.split(" ");
      for (int i = 0; i < words.length; i++) {
        if (vowels.contains(words[i].charAt(0))) {
          String newWord = words[i] + "ma";
          int j = i + 1;
          while (j-- > 0) {
            newWord += 'a';
          }
          sb.append(newWord);
          sb.append(" ");
        } else {
          StringBuilder subSb = new StringBuilder(words[i].substring(1));
          subSb.append(words[i].charAt(0));
          subSb.append("ma");
          int j = i + 1;
          while (j-- > 0) {
            subSb.append("a");
          }
          sb.append(subSb.toString());
          sb.append(" ");
        }
      }
      return sb.substring(0, sb.length() - 1);
    }
  }
}