diff --git a/Algorithm/BOJ/11399.py b/Algorithm/BOJ/11399.py
new file mode 100644
index 0000000..94a5a2f
--- /dev/null
+++ b/Algorithm/BOJ/11399.py
@@ -0,0 +1,11 @@
+n = int(input())
+arr = list(map(int, input().split()))
+
+answer = 0
+arr.sort()
+
+for i in arr:
+    answer += i * n
+    n = n-1
+
+print(answer)
\ No newline at end of file