CF455D.Serega and Fun
省选/NOI-
通过率:0%
时间限制:4.00s
内存限制:256MB
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题目描述
Serega loves fun. However, everyone has fun in the unique manner. Serega has fun by solving query problems. One day Fedor came up with such a problem.
You are given an array a consisting of n positive integers and queries to it. The queries can be of two types:
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Make a unit cyclic shift to the right on the segment from l to r (both borders inclusive). That is rearrange elements of the array in the following manner:
a[l], a[l + 1], ..., a[r - 1], a[r] → a[r], a[l], a[l + 1], ..., a[r - 1].
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Count how many numbers equal to k are on the segment from l to r (both borders inclusive).
Fedor hurried to see Serega enjoy the problem and Serega solved it really quickly. Let's see, can you solve it?
谢尔加喜欢有趣的事情。然而,每个人享受乐趣的方式都各不相同。谢尔加的乐趣在于解决查询类问题。有一天,费奥多尔提出了这样一个问题。
给你一个由 n 个正整数组成的数组 a,以及对该数组的一系列查询。查询分为两种类型:
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对区间 [l,r](两端均包含)执行一次向右的循环移位(即单位循环右移)。也就是说,将该区间内的数组元素按如下方式重新排列:
a[l], a[l+1], …, a[r−1], a[r] → a[r], a[l], a[l+1], …, a[r−1]。 -
统计区间 [l,r](两端均包含)内等于 k 的数的个数。
费奥多尔迫不及待地想看到谢尔加享受这道题,而谢尔加也迅速地解决了它。那么,你能否也解出来呢?
输入格式
The first line contains integer n (1 ≤ n ≤ 105) — the number of elements of the array. The second line contains n integers a[1], a[2], ..., a[n] (1 ≤ a[i] ≤ n).
The third line contains a single integer q (1 ≤ q ≤ 105) — the number of queries. The next q lines contain the queries.
As you need to respond to the queries online, the queries will be encoded. A query of the first type will be given in format: 1 l'i r'i. A query of the second type will be given in format: 2 l'i r'i k'i. All the number in input are integer. They satisfy the constraints: 1 ≤ l'i, r'i, k'i ≤ n.
To decode the queries from the data given in input, you need to perform the following transformations:
l__i = ((l'i + lastans - 1) mod n) + 1; r__i = ((r'i + lastans - 1) mod n) + 1; k__i = ((k'i + lastans - 1) mod n) + 1.
Where lastans is the last reply to the query of the 2-nd type (initially, lastans = 0). If after transformation l__i is greater than r__i, you must swap these values.
第一行包含一个整数 n(1≤n≤105)—— 表示数组的元素个数。
第二行包含 n 个整数 a[1], a[2], …, a[n](1≤a[i]≤n)。
第三行包含一个整数 q(1≤q≤105)—— 表示查询的个数。接下来的 q 行为查询内容。
由于你需要在线回答这些查询,因此输入中的查询是经过编码的。第一类查询的格式为:1 l'_i r'_i;第二类查询的格式为:2 l'_i r'_i k'_i。输入中所有数字均为整数,且满足约束:1≤li′, ri′, ki′≤n。
为从输入数据中解码查询,需执行如下变换:
li=((li′+lastans−1)modn)+1;ri=((ri′+lastans−1)modn)+1;ki=((ki′+lastans−1)modn)+1.
其中 lastans 表示上一次第二类查询的答复(初始时 lastans=0)。若变换后 li>ri,则必须交换 li 与 ri 的值。
输出格式
For each query of the 2-nd type print the answer on a single line.
对于每个第 2 类查询,在单独一行输出答案。
输入输出样例
输入#1
7 6 6 2 7 4 2 5 7 1 3 6 2 2 4 2 2 2 4 7 2 2 2 5 1 2 6 1 1 4 2 1 7 3
输出#1
2 1 0 0
输入#2
8 8 4 2 2 7 7 8 8 8 1 8 8 2 8 1 7 1 8 1 1 7 3 2 8 8 3 1 1 4 1 2 7 1 4 5
输出#2
2 0
输入解题思路,AI测评打分。不知道怎么写?