We have two types of tiles: a 2x1 domino shape, and an "L" tromino shape. These shapes may be rotated. XX <- domino XX <- "L" tromino X Given N, how many ways are there to tile a 2 x N board? Return your answer modulo 10^9 + 7. (…

We have two types of tiles: a 2x1 domino shape, and an "L" tromino shape. These shapes may be rotated. XX <- domino XX <- "L" tromino X Given N, how many ways are there to tile a 2 x N board? Return your answer modulo 10^9 + 7. (…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/domino-and-tromino-tiling/description/ 题目描述: We have two types of tiles: a 2x1 domino shape, and an "L" tromino shape. These shapes may be rotated. XX &l…

We have two types of tiles: a 2x1 domino shape, and an "L" tromino shape. These shapes may be rotated. XX <- domino XX <- "L" tromino X Given N, how many ways are there to tile a 2 x N board? Return your answer modulo 10^9 + 7. (…

We have two types of tiles: a 2x1 domino shape, and an "L" tromino shape. These shapes may be rotated. XX <- domino XX <- "L" tromino X Given N, how many ways are there to tile a 2 x N board? Return your answer modulo 10^9 + 7. (…

We have two types of tiles: a 2x1 domino shape, and an "L" tromino shape. These shapes may be rotated. XX <- domino XX <- "L" tromino X Given N, how many ways are there to tile a 2 x N board? Return your answer modulo 10^9 + 7. (…

2018-09-01 22:38:19 问题描述: 问题求解: 本题如果是第一看到,应该还是非常棘手的,基本没有什么思路. 不妨先从一种简化的版本来考虑.如果仅有一种砖块,那么,填充的方式如下.…

思路: dp.没有像discuss中的那样优化递推式. 实现: class Solution { public: ; int numTilings(int N) { vector<vector<, vector<, )); dp[][] = ; dp[][] = dp[][] = dp[][] = ; ; i <= N; i++) { dp[i][] = (((dp[i - ][] + dp[i - ][]) % MOD + dp[i - ][]) % MOD + dp[i - ]…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 字典统计 代码 复杂度分析 日期 题目地址:https://leetcode.com/problems/number-of-equivalent-domino-pairs/ 题目描述 Given a list of dominoes, dominoes[i] = [a, b] is equivalent to dominoes[j] = [c, d]…

这是小川的第394次更新,第428篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第259题(顺位题号是1128).给定多米诺骨牌列表,当且仅当(a == c且b == d)或(a == d且b == c),dominoes[i] = [a,b]等价于dominoes[j] = [c,d],也就是说,一个多米诺骨牌可以旋转到等价于另一个多米诺骨牌. 返回0 <= i < j < dominoes.length,并且dominoes[i]等价于dominoes[…