add 2404

Author: fishercoder1534

README.md

@@ -10,6 +10,7 @@ _If you like this project, please leave me a star._ ★
 |------|----------------|------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|----------------------------------|-------------
 | 2432 |[The Employee That Worked on the Longest Task](https://leetcode.com/problems/the-employee-that-worked-on-the-longest-task/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2432.java)                                                                     || Easy                                                                          ||
 | 2427 |[Number of Common Factors](https://leetcode.com/problems/number-of-common-factors/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2427.java)                                                                     || Easy                                                                          ||
+| 2404 |[Most Frequent Even Element](https://leetcode.com/problems/most-frequent-even-element/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2404.java)                                                                      || Easy                                                                          ||
 | 2399 |[Check Distances Between Same Letters](https://leetcode.com/problems/check-distances-between-same-letters/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2399.java)                                                                     || Medium                                                                        ||
 | 2395 |[Find Subarrays With Equal Sum](https://leetcode.com/problems/find-subarrays-with-equal-sum/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2395.java)                                                                     || Easy                                                                          ||
 | 2380 |[Time Needed to Rearrange a Binary String](https://leetcode.com/problems/time-needed-to-rearrange-a-binary-string/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2380.java)                                                                     || Medium                                                                        ||

src/main/java/com/fishercoder/solutions/_2404.java

@@ -0,0 +1,36 @@
+package com.fishercoder.solutions;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class _2404 {
+    public static class Solution1 {
+        public int mostFrequentEven(int[] nums) {
+            Map<Integer, Integer> map = new HashMap<>();
+            for (int i = 0; i < nums.length; i++) {
+                if (nums[i] % 2 == 0) {
+                    map.put(nums[i], map.getOrDefault(nums[i], 0) + 1);
+                }
+            }
+            List<Integer> smallestEvens = new ArrayList<>();
+            int freq = 0;
+            for (int key : map.keySet()) {
+                if (map.get(key) > freq) {
+                    smallestEvens.clear();
+                    freq = map.get(key);
+                    smallestEvens.add(key);
+                } else if (map.get(key) == freq) {
+                    smallestEvens.add(key);
+                }
+            }
+            if (smallestEvens.size() < 1) {
+                return -1;
+            }
+            Collections.sort(smallestEvens);
+            return smallestEvens.get(0);
+        }
+    }
+}