From 4b3da8b09f615a523bf80ac99020660ae7413245 Mon Sep 17 00:00:00 2001
From: Kento Futatsugami <futatsugami_kento@ideal-ltd.jp>
Date: Sat, 11 Sep 2021 10:35:17 +0900
Subject: [PATCH] =?UTF-8?q?=E3=83=88=E3=83=AA=E3=83=9C=E3=83=8A=E3=83=83?=
 =?UTF-8?q?=E3=83=81=E9=96=A2=E6=95=B0=E3=81=AE=E5=AE=8C=E6=88=90?=
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---
 app.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/app.js b/app.js
index bba68419..ad671cd9 100644
--- a/app.js
+++ b/app.js
@@ -1,12 +1,13 @@
 'use strict';
 const memo = new Map();
 memo.set(0, 0);
-memo.set(1, 1);
+memo.set(1, 0);
+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;
 }