题目链接 题意 : 一个有n段长的金属棍,开始都涂上铜,分段涂成别的,金的值是3,银的值是2,铜的值是1,然后问你最后这n段总共的值是多少. 思路 : 线段树的区间更新.可以理解为线段树成段更新的模板题. //HDU 1698 #include <cstdio> #include <cstring> #include <iostream> using namespace std; ],p[] ; //lz延迟标记,每次更新不需要更新到底,使得更新延迟到下次更新或者查询的…

题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=1698 题目大意: 有一个钩子有n条棍子组成,棍子有铜银金三种组成,价值分别为1,2,3.为了对付每场战斗需要对组成钩子某个区间的棍子进行调整.问经过q次调整后钩子的总价值是多少? 解题思路: 线段树更新.因为数据范围的问题,每次更新到节点会TLE.用区间更新就会节省很多的时间,对每一个区间来讲,如果这个区间里面的棍子都是相同类型的,就用一个节点变量记录棍子类型,如果区间内棍子是不同类型,则将变量记…

Just a Hook Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 15129    Accepted Submission(s): 7506 Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing f…

Just a Hook Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 27359    Accepted Submission(s): 13593 Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing…

Just a Hook                                                                             Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description In the game of DotA, Pudge's meat hook is actually the mos…

成段更新的线段树,加入了延时标记............ 线段树这种东西细节上的理解因人而异,还是要自己深入理解......慢慢来 #include <iostream> #include <algorithm> #include <cmath> #include <cstdio> #include <cstdlib> #include <cstring> #include <string> #include <ve…

题目 写了一天的线段树,这道题主要说明一下sum是赋值的,不是累加的,并且在push_down的时候lazy也是赋值的.因可能对懒标记的理解还不是很透彻吧. #include <iostream> #include <cstdio> #include <cstring> using namespace std; const int Max = 1e5+10; typedef long long ll; struct Tree{ int L,R; ll sum; int…

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…

Just a Hook Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1698 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 u…

线段树基本操作练习,防手生 #include <cstdio> #include <cstring> #include <cstdlib> #define lson l, m, rt << 1 #define rson m + 1, r, rt << 1 | 1 #define lc rt << 1 #define rc rt << 1 | 1 ; ]; ]; void PushUp( int rt ) { sum[rt]…