Can you answer these queries? Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5195 Description A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapo…

描述 A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Each of the battleships can be marked a value of endurance. For every attack of our secret weapon,…

题目 线段树 简单题意: 区间(单点?)更新,区间求和  更新是区间内的数开根号并向下取整 这道题不用延迟操作 //注意: //1:查询时的区间端点可能前面的比后面的大: //2:优化:因为每次更新都是开平方,同一个数更新有限次数就一直是1了,所以可以这样优化 #include <stdio.h> #include<math.h> #define N 100010 #define LL __int64 #define lson l,m,rt<<1 #define rso…

线段树+剪枝优化!!! 代码如下: #include<iostream> #include<stdio.h> #include<algorithm> #include<iomanip> #include<cmath> #include<cstring> #include<string> #include<vector> #include<stdlib.h> #define ll __int64 #d…

题意 : 给你N个数以及M个操作,操作分两类,第一种输入 "0 l r" 表示将区间[l,r]里的每个数都开根号.第二种输入"1 l r",表示查询区间[l,r]里所有数的和. 分析 : 不难想到用线段树,但是这里的线段树开根操作的更新很明显不能跟加减操作那样子通过Lazy Tag来实现,那么最笨的方法就是一直更新到叶子节点,不过这也就失去了线段树的高效性,每一次操作都更新到叶子节点的话会超时,此时来想想有没有什么规律可以减少操作的复杂度,细想就会发现在有限次的开根…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4027 Can you answer these queries? Description Problem Description A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the b…

Can you answer these queries? Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others) Total Submission(s): 16260    Accepted Submission(s): 3809 Problem Description A lot of battleships of evil are arranged in a line befor…

Can you answer these queries? Time Limit:2000MS     Memory Limit:65768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4027 Description A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use…

Can you answer these queries? Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others)Total Submission(s): 10249    Accepted Submission(s): 2350 Problem Description A lot of battleships of evil are arranged in a line before…

题目链接 题意 : 给你N个数,进行M次操作,0操作是将区间内的每一个数变成自己的平方根(整数),1操作是求区间和. 思路 :单点更新,区间查询,就是要注意在更新的时候要优化,要不然会超时,因为所有的数开几次方之后都会变成1,所以到了1不用没完没了的更新. //HDU 4027 #include <cstdio> #include <cstring> #include <cmath> #include <iostream> #define LL __int6…