题意: 给你N个数,q组操作,操作有两种,查询和改变,查询就是查询当前的这个数上有多少,更改是给你a b k c,每次从a到b,每隔k的数更改一次,之间的数不更改,就相当于跳着更新. 思路:(别人的) (i - a) % k == 0 等价于 i % k == a % k 一共有10中情况 还有枚举所有情况中的小情况 (1)1 2 3 4 5 6 7 8 9..... (2)1 3 5 7 9 11 13 ...... 2 4 6 8…
http://acm.hdu.edu.cn/showproblem.php?pid=4614 Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65535/32768 K (Java/Others) Problem Description Alice is so popular that she can receive many flowers everyday. She has N vases numbered from 0 to…
Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number in a given interval. The other is to ask for the sum of numbers in a given interval. In…
[模板]树链剖分 题目描述 已知一棵包含N个结点的树(连通且无环),每个节点上包含一个数值,需要支持以下操作: 操作1: 格式: 1 x y z 表示将树从x到y结点最短路径上所有节点的值都加上z 操作2: 格式: 2 x y 表示求树从x到y结点最短路径上所有节点的值之和 操作3: 格式: 3 x z 表示将以x为根节点的子树内所有节点值都加上z 操作4: 格式: 4 x 表示求以x为根节点的子树内所有节点值之和 树链剖分模板题废话 然而事实上我之前一直都不会树链剖分(真不知道我怎么活到现在的…
A Simple Problem with Integers Time Limit:5000MS Memory Limit:131072K Case Time Limit:2000MS Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each…
A Simple Problem with Integers Time Limit:5000MS Memory Limit:131072K Case Time Limit:2000MS Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each…
Copying Data Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Description We often have to copy large volumes of information. Such operation can take up many computer resources. Therefore, in this problem you are advised to come…
Just a Hook Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 23229 Accepted Submission(s): 11634 Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing…
题目大意 给定一个序列a[1],a[2]--a[n] 接下来给出m种操作,每种操作是以下形式的: l r d 表示把区间[l,r]内的每一个数都加上一个值d 之后有k个操作,每个操作是以下形式的: x y 表示把第x种操作一直到第y种操作都执行一遍 最终输出在k个操作结束之后的序列 题目大意 就是线段树的成段更新嘛~~~先用线段树统计每种操作的次数,然后再执行m次成段更新,最后查询到底的查询即可~~~树状数组也可搞,似乎写起来还更简单些~~~还有一个更犀利的O(n)的算法,不过我暂时还没弄懂~~…
A Simple Problem with Integers Time Limit: 5000MS Memory Limit: 131072K Total Submissions: 59046 Accepted: 17974 Case Time Limit: 2000MS Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of…
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…