add 2586

Author: fishercoder1534

README.md

@@ -8,6 +8,7 @@ _If you like this project, please leave me a star._ ★
 
 | #    |      Title     | Solutions                                                                                                                                | Video                                                                         | Difficulty                       | Tag                  
 |------|----------------|------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|----------------------------------|-------------
+| 2586 |[Count the Number of Vowel Strings in Range](https://leetcode.com/problems/count-the-number-of-vowel-strings-in-range/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2586.java)                                                                     |                                                                               | Easy                             |
 | 2583 |[Kth Largest Sum in a Binary Tree](https://leetcode.com/problems/kth-largest-sum-in-a-binary-tree/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2583.java)                                                                     |                                                                               | Medium                           |
 | 2582 |[Pass the Pillow](https://leetcode.com/problems/pass-the-pillow/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2582.java)                                                                     |                                                                               | Easy                             |
 | 2566 |[Maximum Difference by Remapping a Digit](https://leetcode.com/problems/maximum-difference-by-remapping-a-digit/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2566.java)                                                                     |                                                                               | Easy                             |

src/main/java/com/fishercoder/solutions/_2586.java

@@ -0,0 +1,27 @@
+package com.fishercoder.solutions;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+public class _2586 {
+    public static class Solution1 {
+        public int vowelStrings(String[] words, int left, int right) {
+            int count = 0;
+            for (int i = left; i <= right; i++) {
+                if (isVowelString(words[i])) {
+                    count++;
+                }
+            }
+            return count;
+        }
+
+        private boolean isVowelString(String word) {
+            Set<Character> set = new HashSet<>(Arrays.asList('a', 'e', 'i', 'o', 'u'));
+            if (set.contains(word.charAt(0)) && set.contains(word.charAt(word.length() - 1))) {
+                return true;
+            }
+            return false;
+        }
+    }
+}