假设你有一个很长的花坛,一部分地块种植了花,另一部分却没有.可是,花卉不能种植在相邻的地块上,它们会争夺水源,两者都会死去. 给定一个花坛(表示为一个数组包含0和1,其中0表示没种植花,1表示种植了花),和一个数 n .能否在不打破种植规则的情况下种入 n 朵花?能则返回True,不能则返回False. 示例 1: 输入: flowerbed = [1,0,0,0,1], n = 1 输出: True 示例 2: 输入: flowerbed = [1,0,0,0,1], n = 2 输出: Fa…

Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots - they would compete for water and both would die. Given a flowerbed (represented as an array containing 0…

In this lesson you will learn to describe what people can do. 在本课中,您将学习如何描述人们可以做什么. STARTE drive a car  驾驶汽车 read music 读乐谱 run fast  跑得快 ride a bicycle  骑自行车 swim 100 meters  游100米 cook well  下厨:容易煮 play chess 玩西洋棋 play the violin 拉小提琴 speak a forei…

Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots - they would compete for water and both would die. Given a flowerbed (represented as an array containing 0…

605. 种花问题 605. Can Place Flowers 题目描述 假设你有一个很长的花坛,一部分地块种植了花,另一部分却没有.可是,花卉不能种植在相邻的地块上,它们会争夺水源,两者都会死去. 给定一个花坛(表示为一个数组包含 0 和 1,其中 0 表示没种植花,1 表示种植了花),和一个数 n .能否在不打破种植规则的情况下种入 n 朵花?能则返回 True,不能则返回 False. 每日一算法2019/5/9Day 6LeetCode605. Can Place Flowers 示例…

Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots - they would compete for water and both would die. Given a flowerbed (represented as an array containing 0…

［抄题］: Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, flowers cannot be planted in adjacent plots - they would compete for water and both would die. Given a flowerbed (represented as an array contai…

Codeforces Round #258 (Div. 2) Devu and Flowers E. Devu and Flowers time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Devu wants to decorate his garden with flowers. He has purchased n boxes…

题目网址:http://acm.hdu.edu.cn/showproblem.php?pid=4325 Description As is known to all, the blooming time and duration varies between different kinds of flowers. Now there is a garden planted full of flowers. The gardener wants to know how many flowers w…

Flowers Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2616    Accepted Submission(s): 1287 Problem Description As is known to all, the blooming time and duration varies between different kinds…

Problem Description As you know, Gardon trid hard for his love-letter, and now he's spending too much time on choosing flowers for Angel. When Gardon entered the flower shop, he was frightened and dazed by thousands kinds of flowers. "How can I choos…

http://acm.hdu.edu.cn/showproblem.php?pid=4325 Flowers Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2633    Accepted Submission(s): 1290 Problem Description As is known to all, the blooming t…

You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto the shelf and are numbered consecutively 1…

CF451E Devu and Flowers(容斥) 题目大意 \(n\)种花每种\(f_i\)个,求选出\(s\)朵花的方案.不一定每种花都要选到. \(n\le 20\) 解法 利用可重组合的公式. 不考虑\(f_i\)的限制,直接可重组合的方案是,意思是从可以重复的\(n\)个元素中取出\(r\)个的个数.注意,根据定义,此时\(r\)种每个都要选. \[ f(s,r)={s+r-1 \choose r-1} \] 考虑限制怎么办,我们先容斥. 我们可以钦定某些花选择了\(f_i+1\)…

Devu wants to decorate his garden with flowers. He has purchased n boxes, where the i-th box contains fi flowers. All flowers in a single box are of the same color (hence they are indistinguishable). Also, no two boxes have flowers of the same color.…

D. Flowers   We saw the little game Marmot made for Mole's lunch. Now it's Marmot's dinner time and, as we all know, Marmot eats flowers. At every dinner he eats some red and white flowers. Therefore a dinner can be represented as a sequence of sever…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 解题方法 贪婪算法 日期 题目地址:https://leetcode.com/problems/can-place-flowers/description/ 题目描述 Suppose you have a long flowerbed in which some of the plots are planted and some are not. However, fl…

http://poj.org/problem?id=3262 Protecting the Flowers Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 4930   Accepted: 1965 Description Farmer John went to cut some wood and left N (2 ≤ N ≤ 100,000) cows eating the grass, as usual. When…

我只是想做壮鸭低劈啊,为什么只有状压没有DP-- 原题: 植物大战僵尸这款游戏中,还有个特别有意思的赚钱方式--种花(能长金币的花).种出来的金币需要玩家点击才能得到,或者,玩家可以购买一只蜗牛来帮助捡金币.然而,蜗牛爬得慢是众所周知的.所以,场上有若干金币时,蜗牛总是喜欢以最少的行程来捡走所有的金币.现在告诉你场上n个金币所在位置的坐标,以及蜗牛所在位置,让你求出蜗牛捡走所有金币的最小行程. n<=16 x.y<=10000 恩这题核心思路是压缩一维状态表示那些花取过了 还要有一维表示当前蜗…

B. Alyona and flowers Problem Description: Let's define a subarray as a segment of consecutive flowers. The mother suggested some set of subarrays. Alyona wants to choose several of the subarrays suggested by her mother. After that, each of the flowe…

Description You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto the shelf and are numbered con…

Pashmak and Flowers Codeforces Round #261 (Div. 2) B. Pashmak and Flowers time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Pashmak decided to give Parmida a pair of flowers from the garden.…

104. Little shop of flowers time limit per test: 0.25 sec. memory limit per test: 4096 KB 问题: 你想要将你的花窗安排得最具美感.有F束花,每一束花都不一样,至少有F个按顺序排成一行的花瓶.花瓶从左到右,依次编号1-V.而花放置的位置是可以改变的,花依次编号1到F.花的序号有一个特征,即是序号决定了花束出现在花瓶里的顺序.例如,有两束花编号i和j,满足i<j,那么i所在的花瓶一定要在j所在花瓶的左边,即是i…

题 There are n sharks who grow flowers for Wet Shark. They are all sitting around the table, such that sharks i andi + 1 are neighbours for all i from 1 to n - 1. Sharks n and 1 are neighbours too. Each shark will grow some number of flowers si. For i…

C. Watering Flowers time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A flowerbed has many flowers and two fountains. You can adjust the water pressure and set any values r1(r1 ≥ 0) and r2(r…

[POJ1157]LITTLE SHOP OF FLOWERS 试题描述 You want to arrange the window of your flower shop in a most pleasant way. You have F bunches of flowers, each being of a different kind, and at least as many vases ordered in a row. The vases are glued onto the s…

春天到了,师大的园丁们又开始忙碌起来了. 京师广场上有一块空地,边界围成了一个多边形,内部被划分成一格一格的.园丁们想在这个多边形内的每一格内种植一些花. 现在请你帮忙计算一下一共最多可以种多少花. 广场用一个M*N的字符数组表示,"."和"*"代表一个方格,其中"*"代表空地的边界,"."是空格,只有边界内部的空格才能用于种花. 一个空格位于边界内部,当且仅当由该点出发只允许向上.下.左.右四个方向移动,最终都会遇到边界.…

题目链接:http://codeforces.com/problemset/problem/474/D 题目意思:Marmot 吃两种类型的花(实在难以置信呀--):red 或者 white,如果要吃到white这种花,就需要吃连续 k 朵 white:而如果吃 red,就没有这种限制.给定区间[a, b],问总共的吃法有多少种. dp 题!状态转移方程不难得到.设 dp[i] 表示 长度为 i 时 的吃法种数. dp[i] = dp[i-1] + dp[i-k] 对于当前 i,或者是从第 i-…

Flowers Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4325 Description As is known to all, the blooming time and duration varies between different kinds of flowers. Now there is a garden plant…

Vases and Flowers Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 38    Accepted Submission(s): 10 Problem Description Alice is so popular that she can receive many flowers everyday. She has N v…