diff --git a/LeetCode/0561_Array_Partition_I.py b/LeetCode/0561_Array_Partition_I.py
new file mode 100644
index 0000000..1743f89
--- /dev/null
+++ b/LeetCode/0561_Array_Partition_I.py
@@ -0,0 +1,3 @@
+class Solution:
+    def arrayPairSum(self, nums: List[int]) -> int:
+        return sum(sorted(nums)[::2])
\ No newline at end of file