Solve : Missing Number

printjin-gmailcom · printjin-gmailcom · commit 37cada7510c5 · 2025-06-08T14:44:56.000+09:00
diff --git a/missing-number/printjin-gmailcom.py b/missing-number/printjin-gmailcom.py
@@ -0,0 +1,6 @@
+class Solution:
+    def missingNumber(self, nums):
+        n = len(nums)
+        expected_sum = n * (n + 1) // 2
+        actual_sum = sum(nums)
+        return expected_sum - actual_sum
