Leetcode刷题Day38-------------------动态规划
1. 理论基础
- 文章链接:https://programmercarl.com/%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92%E7%90%86%E8%AE%BA%E5%9F%BA%E7%A1%80.html
- 视频链接:https://www.bilibili.com/video/BV13Q4y197Wg
- 题目链接:https://leetcode.cn/problems/fibonacci-number/
动规题目: ------------------------------------- 动规五部曲:
(该图截自B站代码随想录视频)
2. 509. 斐波那契数
- 题目链接:https://leetcode.cn/problems/climbing-stairs/
- 文章链接:https://programmercarl.com/0509.%E6%96%90%E6%B3%A2%E9%82%A3%E5%A5%91%E6%95%B0.html
- 视频链接:https://www.bilibili.com/video/BV1f5411K7mo
class Solution {public int fib(int n) {int[] ints=new int[n+2];ints[0]=0;ints[1]=1;for(int i=2;i<=n;i++) ints[i]=ints[i-1]+ints[i-2];return ints[n];}
}
3. 70. 爬楼梯
- 文章链接:https://programmercarl.com/0070.%E7%88%AC%E6%A5%BC%E6%A2%AF.html
- 视频链接:https://www.bilibili.com/video/BV17h411h7UH
class Solution {public int climbStairs(int n) {int[] ints=new int[n+2];ints[1]=1;ints[2]=2;for(int i=3;i<=n;i++) ints[i]=ints[i-1]+ints[i-2];return ints[n];}
}
4. 746. 使用最小花费爬楼梯
- 题目链接:https://leetcode.cn/problems/min-cost-climbing-stairs/
- 文章链接:https://programmercarl.com/0746.%E4%BD%BF%E7%94%A8%E6%9C%80%E5%B0%8F%E8%8A%B1%E8%B4%B9%E7%88%AC%E6%A5%BC%E6%A2%AF.html
- 视频链接:https://www.bilibili.com/video/BV16G411c7yZ
class Solution {public int minCostClimbingStairs(int[] cost) {int len = cost.length;int[] dp = new int[len + 1];dp[0] = 0;dp[1] = 0;for (int i = 2; i <= len; i++) {dp[i] = Math.min(dp[i - 1] + cost[i - 1], dp[i - 2] + cost[i - 2]);}return dp[len];}
}