add 3921

Author: fishercoder1534

paginated_contents/algorithms/4th_thousand/README.md

@@ -5,6 +5,7 @@
 | 3992 | [Rearrange String to Avoid Character Pair](https://leetcode.com/problems/rearrange-string-to-avoid-character-pair/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3992.java) |                                                                               | Easy       |
 | 3986 | [Number of Elapsed Seconds Between Two Times](https://leetcode.com/problems/number-of-elapsed-seconds-between-two-times/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3986.java) |                                                                               | Easy       |
 | 3982 | [Sum of Integers with Maximum Digit Range](https://leetcode.com/problems/sum-of-integers-with-maximum-digit-range/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3982.java) |                                                                               | Easy       |
+| 3978 | [Unique Middle Element](https://leetcode.com/problems/unique-middle-element/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3978.java) |                                                                               | Easy       |
 | 3963 | [Create Grid With Exactly One Path](https://leetcode.com/problems/create-grid-with-exactly-one-path/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3963.java) |                                                                               | Easy       |
 | 3959 | [Check Good Integer](https://leetcode.com/problems/check-good-integer/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3959.java) |                                                                               | Easy       |
 | 3954 | [Sum of Compatible Numbers in Range I](https://leetcode.com/problems/sum-of-compatible-numbers-in-range-i/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3954.java) |                                                                               | Easy       |
@@ -15,9 +16,9 @@
 | 3936 | [Minimum Swaps to Move Zeros to End](https://leetcode.com/problems/minimum-swaps-to-move-zeros-to-end/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3936.java) |                                                                               | Easy       |
 | 3931 | [Check Adjacent Digit Differences](https://leetcode.com/problems/check-adjacent-digit-differences/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3931.java) |                                                                               | Easy       |
 | 3925 | [Concatenate Array With Reverse](https://leetcode.com/problems/concatenate-array-with-reverse/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3925.java) |                                                                               | Easy       |
+| 3921 | [Score Validator](https://leetcode.com/problems/score-validator/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3921.java) |                                                                               | Easy       |
 | 3913 | [Sort Vowels by Frequency](https://leetcode.com/problems/sort-vowels-by-frequency/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3913.java) |                                                                               | Easy       |
 | 3908 | [Valid Digit Number](https://leetcode.com/problems/valid-digit-number/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3908.java) |                                                                               | Easy       |
-| 3978 | [Unique Middle Element](https://leetcode.com/problems/unique-middle-element/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3978.java) |                                                                               | Easy       |
 | 3701 | [Compute Alternating Sum](https://leetcode.com/problems/compute-alternating-sum/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3701.java) |                                                                               | Easy       |
 | 3662 | [Filter Characters by Frequency](https://leetcode.com/problems/filter-characters-by-frequency/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3662.java) |                                                                               | Easy       |
 | 3606 | [Coupon Code Validator](https://leetcode.com/problems/coupon-code-validator/)                                                               | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/fourththousand/_3606.java) |                                                                               | Easy       |

src/main/java/com/fishercoder/solutions/fourththousand/_3921.java

@@ -0,0 +1,24 @@
+package com.fishercoder.solutions.fourththousand;
+
+public class _3921 {
+    public static class Solution1 {
+        public int[] scoreValidator(String[] events) {
+            int[] result = new int[2];
+            for (String event : events) {
+                if (event.equals("W")) {
+                    result[1]++;
+                    if (result[1] == 10) {
+                        return result;
+                    }
+                } else {
+                    if (event.equals("WD") || event.equals("NB")) {
+                        result[0]++;
+                    } else {
+                        result[0] += Integer.parseInt(event);
+                    }
+                }
+            }
+            return result;
+        }
+    }
+}

src/test/java/com/fishercoder/fourththousand/_3921Test.java

@@ -0,0 +1,21 @@
+package com.fishercoder.fourththousand;
+
+import com.fishercoder.solutions.fourththousand._3921;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+public class _3921Test {
+    private _3921.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _3921.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertArrayEquals(new int[]{0, 10}, solution1.scoreValidator(new String[]{"W", "W", "W", "W", "W", "W", "W", "W", "W", "W", "W"}));
+    }
+}