[LEET-3304] add 3304

Author: fishercoder1534

paginated_contents/algorithms/4th_thousand/README.md

@@ -1,6 +1,7 @@
 | #    | Title                                                                                                                                                               | Solutions                                                                                                                         | Video                                                                         | Difficulty | Tag                                                                  
 |------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|------------|----------------------------------------------------------------------
 | 3318 | [Find X-Sum of All K-Long Subarrays I](https://leetcode.com/problems/find-x-sum-of-all-k-long-subarrays-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3318.java) |                                                                               | Easy       |
+| 3304 | [Find the K-th Character in String Game I](https://leetcode.com/problems/find-the-k-th-character-in-string-game-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3304.java) |                                                                               | Easy       |
 | 3285 | [Find Indices of Stable Mountains](https://leetcode.com/problems/find-indices-of-stable-mountains/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3285.java) |                                                                               | Easy       |
 | 3264 | [Final Array State After K Multiplication Operations I](https://leetcode.com/problems/final-array-state-after-k-multiplication-operations-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3264.java) |                                                                               | Easy       |
 | 3263 | [Convert Doubly Linked List to Array I](https://leetcode.com/problems/convert-doubly-linked-list-to-array-i/)                                                                 | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3263.java) |                                                                               | Easy       |

src/main/java/com/fishercoder/solutions/fourththousand/_3304.java

@@ -1,2 +1,16 @@
-package com.fishercoder.solutions.fourththousand;public class _3304 {
+package com.fishercoder.solutions.fourththousand;
+
+public class _3304 {
+    public static class Solution1 {
+        public char kthCharacter(int k) {
+            StringBuilder sb = new StringBuilder("a");
+            while (sb.length() <= k) {
+                int n = sb.length();
+                for (int i = 0; i < n; i++) {
+                    sb.append((char) (sb.charAt(i) + 1));
+                }
+            }
+            return sb.charAt(k - 1);
+        }
+    }
 }

src/test/java/com/fishercoder/fourththousand/_3304Test.java

@@ -1,21 +1,26 @@
 package com.fishercoder.fourththousand;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
-import com.fishercoder.solutions.fourththousand._3185;
+import com.fishercoder.solutions.fourththousand._3304;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-public class _3185Test {
-    private _3185.Solution1 solution1;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class _3304Test {
+    private _3304.Solution1 solution1;
 
     @BeforeEach
     public void setup() {
-        solution1 = new _3185.Solution1();
+        solution1 = new _3304.Solution1();
     }
 
     @Test
     public void test1() {
-        assertEquals(2, solution1.countCompleteDayPairs(new int[] {12, 12, 30, 24, 24}));
+        assertEquals('b', solution1.kthCharacter(5));
+    }
+
+    @Test
+    public void test2() {
+        assertEquals('h', solution1.kthCharacter(128));
     }
 }