From e2cd3100cdd01af6c778a2a50f6f637cb18bda1d Mon Sep 17 00:00:00 2001
From: Gyubin Han <89185979+Gyubin-Han@users.noreply.github.com>
Date: Wed, 8 May 2024 20:19:44 +0900
Subject: [PATCH] add: boj/28324.py

---
 boj/28324.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 boj/28324.py

diff --git a/boj/28324.py b/boj/28324.py
new file mode 100644
index 0000000..3c22dfa
--- /dev/null
+++ b/boj/28324.py
@@ -0,0 +1,14 @@
+import sys
+input=sys.stdin.readline
+n=int(input().rstrip())
+arr=list(map(int,input().rstrip().split()))
+
+last=0
+result=0
+for i in range(1,n+1):
+    if arr[-i]>last:
+        last+=1
+    elif arr[-i]<last:
+        last=arr[-i]
+    result+=last
+print(result)