From a07323a2046b203a56011d3be578b12f6e0e2a80 Mon Sep 17 00:00:00 2001
From: LiiNi-coder <97495437+LiiNi-coder@users.noreply.github.com>
Date: Sun, 21 Dec 2025 23:56:26 +0900
Subject: [PATCH] =?UTF-8?q?[20251221]=20BOJ=20/=20G5=20/=20=EC=98=A5?=
 =?UTF-8?q?=EC=83=81=20=EC=A0=95=EC=9B=90=20=EA=BE=B8=EB=AF=B8=EA=B8=B0=20?=
 =?UTF-8?q?/=20=EC=9D=B4=EC=9D=B8=ED=9D=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 ...0 \352\276\270\353\257\270\352\270\260.md" | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 "LiiNi-coder/202512/21 BOJ \354\230\245\354\203\201 \354\240\225\354\233\220 \352\276\270\353\257\270\352\270\260.md"

diff --git "a/LiiNi-coder/202512/21 BOJ \354\230\245\354\203\201 \354\240\225\354\233\220 \352\276\270\353\257\270\352\270\260.md" "b/LiiNi-coder/202512/21 BOJ \354\230\245\354\203\201 \354\240\225\354\233\220 \352\276\270\353\257\270\352\270\260.md"
new file mode 100644
index 00000000..2decc688
--- /dev/null
+++ "b/LiiNi-coder/202512/21 BOJ \354\230\245\354\203\201 \354\240\225\354\233\220 \352\276\270\353\257\270\352\270\260.md"	
@@ -0,0 +1,26 @@
+```java
+import java.io.*;
+import java.util.*;
+
+public class Main {
+	public static void main(String[] args) throws IOException {
+		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+		int N = Integer.parseInt(br.readLine());
+		long answer = 0L;
+		
+		Deque<Integer> stack = new ArrayDeque<>();
+
+		for(int i = 0; i < N; i++){
+			int height = Integer.parseInt(br.readLine());
+			while(!stack.isEmpty() && stack.peekLast() <= height){
+				stack.pollLast();
+			}
+
+			answer += stack.size();
+			stack.offerLast(height);
+		}
+		System.out.println(answer);
+	}
+}
+
+```