add 2206

Author: fishercoder1534

README.md

@@ -10,6 +10,7 @@ _If you like this project, please leave me a star._ ★
 |------|----------------|------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|-------------|-------------
 | 2210 |[Count Hills and Valleys in an Array](https://leetcode.com/problems/count-hills-and-valleys-in-an-array/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2210.java)                                                                     || Easy                                                                          ||
 | 2208 |[Minimum Operations to Halve Array Sum](https://leetcode.com/problems/minimum-operations-to-halve-array-sum/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2208.java)                                                                     || Medium                                                                          ||
+| 2206 |[Divide Array Into Equal Pairs](https://leetcode.com/problems/divide-array-into-equal-pairs/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2206.java)                                                                     || Easy                                                                          ||
 | 2201 |[Count Artifacts That Can Be Extracted](https://leetcode.com/problems/count-artifacts-that-can-be-extracted/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2201.java)                                                                     || Medium                                                                          ||
 | 2200 |[Find All K-Distant Indices in an Array](https://leetcode.com/problems/find-all-k-distant-indices-in-an-array/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2200.java)                                                                     || Easy                                                                          ||
 | 2194 |[Cells in a Range on an Excel Sheet](https://leetcode.com/problems/cells-in-a-range-on-an-excel-sheet/)| [Java](../master/src/main/java/com/fishercoder/solutions/_2194.java)                                                                     || Easy                                                                          ||

src/main/java/com/fishercoder/solutions/_2206.java

@@ -0,0 +1,21 @@
+package com.fishercoder.solutions;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class _2206 {
+    public static class Solution1 {
+        public boolean divideArray(int[] nums) {
+            Map<Integer, Integer> map = new HashMap<>();
+            for (int num : nums) {
+                map.put(num, map.getOrDefault(num, 0) + 1);
+            }
+            for (int key : map.keySet()) {
+                if (map.get(key) % 2 != 0) {
+                    return false;
+                }
+            }
+            return true;
+        }
+    }
+}