From bb9d6e80495676c04c2c613a86b09ff04e5fb78f Mon Sep 17 00:00:00 2001 From: samonmon Date: Sun, 28 Mar 2021 19:39:50 +0900 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..8673d458 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 b39fb7874e2aba32160c55fca6f7076ccbedde80 Mon Sep 17 00:00:00 2001 From: samonmon Date: Sun, 28 Mar 2021 22:40:24 +0900 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 | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/app.js b/app.js index 8673d458..72b8bcce 100644 --- a/app.js +++ b/app.js @@ -1,11 +1,14 @@ '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); + if (memo.has(n)) { + return memo.get(n); + } + const value = fib(n-1) + fib(n-2); + memo.set(n, value); + return value; } const length = 40; for (let i = 0; i <= length; i++) {