From a5c3f7e19528d73e771cbee589153234a2df7bf0 Mon Sep 17 00:00:00 2001
From: seongwon030 <105052068+seongwon030@users.noreply.github.com>
Date: Mon, 29 Apr 2024 17:29:22 +0900
Subject: [PATCH] =?UTF-8?q?2024-4-29=201,2,3=20=EB=8D=94=ED=95=98=EA=B8=B0?=
 =?UTF-8?q?3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../1,2,3 \353\215\224\355\225\230\352\270\2603.py"   | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 "seongwon030/DP/1,2,3 \353\215\224\355\225\230\352\270\2603.py"

diff --git "a/seongwon030/DP/1,2,3 \353\215\224\355\225\230\352\270\2603.py" "b/seongwon030/DP/1,2,3 \353\215\224\355\225\230\352\270\2603.py"
new file mode 100644
index 0000000..a891a28
--- /dev/null
+++ "b/seongwon030/DP/1,2,3 \353\215\224\355\225\230\352\270\2603.py"	
@@ -0,0 +1,11 @@
+import sys
+
+input = sys.stdin.readline
+dp = [1,2,4,7]
+p = 4
+for i in range(int(input())):
+  n = int(input())
+  while(n>p):
+    dp.append((dp[p-3]+dp[p-2]+dp[p-1])%1000000009)
+    p+=1
+  print(dp[n-1])
\ No newline at end of file