From 6bc001f260bbb36bae9433ac5400f752e720fa60 Mon Sep 17 00:00:00 2001 From: Ishizuka Senn Date: Sun, 18 Oct 2020 11:32:07 +0000 Subject: [PATCH 1/2] =?UTF-8?q?=E6=8C=87=E6=95=B0=E3=82=AA=E3=83=BC?= =?UTF-8?q?=E3=83=80=E3=83=BC=E3=81=AEfib=E9=96=A2=E6=95=B0=E3=81=AE?= =?UTF-8?q?=E5=AE=9F=E8=A3=85?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- app.js | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/app.js b/app.js index ad9a93a7..61a8843a 100644 --- a/app.js +++ b/app.js @@ -1 +1,13 @@ 'use strict'; +function fib(n) { + if (n === 0) { + return 0; + } else if (n === 1 ){ + return 1; + } + return fib(n - 1) + fib(n - 2); + } + const length = 40; + for (let i = 0; i <= length; i++) { + console.log(fib(i)); + } \ No newline at end of file From 38d0583ae03cd3f8f8fd7f6d0c965926a27ffc2f Mon Sep 17 00:00:00 2001 From: Ishizuka Senn Date: Sun, 18 Oct 2020 11:44:05 +0000 Subject: [PATCH 2/2] =?UTF-8?q?=E3=83=A1=E3=83=A2=E5=8C=96=E3=81=AB?= =?UTF-8?q?=E3=82=88=E3=82=8B=E3=82=A2=E3=83=AB=E3=82=B4=E3=83=AA=E3=82=BA?= =?UTF-8?q?=E3=83=A0=E3=81=AE=E6=94=B9=E5=96=84?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- app.js | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) diff --git a/app.js b/app.js index 61a8843a..4b3b8f37 100644 --- a/app.js +++ b/app.js @@ -1,13 +1,12 @@ 'use strict'; +const memo = new Map(); +memo.set(0, 0); +memo.set(1, 1); function fib(n) { - if (n === 0) { - return 0; - } else if (n === 1 ){ - return 1; - } - return fib(n - 1) + fib(n - 2); - } - const length = 40; - for (let i = 0; i <= length; i++) { - console.log(fib(i)); - } \ No newline at end of file + if (memo.has(n)) { + return memo.get(n); + } + const value = fib(n - 1) + fib(n - 2); + memo.set(n, value); + return value; + } \ No newline at end of file