From 6f9eca871f56027c3ab598cd9603bfbc6f6bd33f Mon Sep 17 00:00:00 2001 From: zhenzi Date: Sat, 15 May 2021 10:32:59 +0800 Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=20070=E7=88=AC=E6=A5=BC?= =?UTF-8?q?=E6=A2=AF=20Java=20=E7=89=88=E6=9C=AC?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- problems/0070.爬楼梯.md | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/problems/0070.爬楼梯.md b/problems/0070.爬楼梯.md index f0a08f99..286e088f 100644 --- a/problems/0070.爬楼梯.md +++ b/problems/0070.爬楼梯.md @@ -213,6 +213,28 @@ public: Java： +```java +// 常规方式 +public int climbStairs(int n) { + int[] dp = new int[n + 1]; + dp[0] = 1; + dp[1] = 1; + for (int i = 2; i <= n; i++) { + dp[i] = dp[i - 1] + dp[i - 2]; + } + return dp[n]; +} +// 用变量记录代替数组 +public int climbStairs(int n) { + int a = 0, b = 1, c = 0; // 默认需要1次 + for (int i = 1; i <= n; i++) { + c = a + b; // f(i - 1) + f(n - 2) + a = b; // 记录上一轮的值 + b = c; // 向后步进1个数 + } + return c; +} +``` Python：