Just a Hook Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 22730    Accepted Submission(s): 11366 Problem Description In the game of DotA, Pudge's meat hook is actually the most horrible thing…

学习线段树第二天,这道题属于第二简单的线段树,第一简单是单点更新,这个属于区间更新. 区间更新就是lazy思想,我来按照自己浅薄的理解谈谈lazy思想: 就是在数据结构中,树形结构可以线性存储(线性表)也可以树状存储(链表) 树形typedef struct node { int data; struct node* Lchild; struct node* Rchild; }Btree,*BTree;BTree = (BTree)malloc(Btree);好像是这样吧...大半个暑假过去忘得…

题解: 和hdu1166敌兵布阵不同的是 这道题需要区间更新(成段更新). 单点更新不用说了比较简单,区间更新的话,如果每次都更新到底的话,有点费时间. 这里就体现了线段树的另一个重要思想:延迟标记. 在定义树节点结构体的时候加一个标记:flag. typedef struct node { node():l(0),r(0),data(0),flag(0){} //构造函数 初始化数据成员 int l,r; int data; //每个节点的数据 int flag; //延迟标记 }TNode;…

Just a Hook Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 17124    Accepted Submission(s): 8547 Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing f…

题目0到n-1的花瓶,操作1在下标a开始插b朵花,输出始末下标.操作2清空[a,b]的花瓶,求清除的花的数量.线段树懒惰标记来更新区间.操作1,先查询0到a-1有num个空瓶子,然后用线段树的性质,或者二分找出第num+1个空瓶子的下标,和第num+b个空瓶子的下标.再区间更新为满.操作2,也相当于区间更新为空. #include<cstdio> #include<cstring> #include<algorithm> #define N 50001 using na…

传送门 •题目描述 题目描述 众所周知,一战过后,在世界列强建造超无畏级战列舰的竞争之中,旧日本海军根据“个舰优越主义”,建造了扶桑级战列舰,完工时为当时世界上武装最为强大的舰只. 同时,扶桑号战列舰也是舰岛最为科幻的战列舰. 当然,要建造这样的舰船,科技水平是必须的. 同样众所周知的是,德意志科学技术天下第一,所以IJN的司令官从德国学来了一种先进的建船方法. 一只战舰横过来可以看做一个长度为n的序列,每个位置有一个数ai表示这个位置设计的高度.这种先进的造船技术可以每次将一个区间[l,r]内…

描述 In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive metallic sticks which are of the same length. Now Pudge wants to do some operations on the hook. Let us n…

Description: In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive metallic sticks which are of the same length. Now Pudge wants to do some operations on the hook…

Just a Hook In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive metallic sticks which are of the same length. Now Pudge wants to do some operations on the hook.…

Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive metallic sticks which are of the same length. Now Pudge wants to do some operations on t…