From 49073eb792ebc9e535331974adce790d2225d163 Mon Sep 17 00:00:00 2001
From: mitomaro <i.wataru0714@gmail.com>
Date: Tue, 24 Aug 2021 20:27:17 +0900
Subject: [PATCH] =?UTF-8?q?=E3=83=A1=E3=83=A2=E5=8C=96=E3=81=AB=E3=82=88?=
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---
 app.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app.js b/app.js
index bba68419..65086c5d 100644
--- a/app.js
+++ b/app.js
@@ -2,11 +2,12 @@
 const memo = new Map();
 memo.set(0, 0);
 memo.set(1, 1);
+memo.set(2, 1);
 function trib(n) {
     if (memo.has(n)) {
         return memo.get(n);
     }
-    const value = trib(n - 1) + trib(n - 2);
+    const value = trib(n - 1) + trib(n - 2) + trib(n - 3);
     memo.set(n, value);
     return value;
 }