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Play with Chain
Time Limit: 6000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
【Problem Description】
YaoYao is fond of playing his chains. He has a chain containing n diamonds on it. Diamonds are numbered from 1 to n. At first, the diamonds on the chain is a sequence: 1, 2, 3, …, n. He will perform two types of operations:
CUT a b c: He will first cut down the chain from the ath diamond to the bth diamond. And then insert it after the cth diamond on the remaining chain. For example, if n=8, the chain is: 1 2 3 4 5 6 7 8; We perform “CUT 3 5 4”, Then we first cut down 3 4 5, and the remaining chain would be: 1 2 6 7 8. Then we insert “3 4 5” into the chain before 5th diamond, the chain turns out to be: 1 2 6 7 3 4 5 8.
FLIP a b: We first cut down the chain from the ath diamond to the bth diamond. Then reverse the chain and put them back to the original position. For example, if we perform “FLIP 2 6” on the chain: 1 2 6 7 3 4 5 8. The chain will turn out to be: 1 4 3 7 6 2 5 8
He wants to know what the chain looks like after perform m operations. Could you help him?
【Input】
There will be multiple test cases in a test data. For each test case, the first line contains two numbers: n and m (1≤n, m≤3*100000), indicating the total number of diamonds on the chain and the number of operations respectively. Then m lines follow, each line contains one operation. The command is like this: CUT a b c // Means a CUT operation, 1 ≤ a ≤ b ≤ n, 0≤ c ≤ n-(b-a+1). FLIP a b // Means a FLIP operation, 1 ≤ a < b ≤ n. The input ends up with two negative numbers, which should not be processed as a case.
【Output】
For each test case, you should print a line with n numbers. The ith number is the number of the ith diamond on the chain.
【Sample Input】
8 2
CUT 3 5 4
FLIP 2 6
-1 -1
【Sample Output】
【题意】
给出一列数,然后对整个数列执行两种操作:切下一段插入到另外的位置,或者把其中的一整段整个翻转一下。
求经过一系列操作之后,数列最后的样子。
【分析】
数据范围最高能够到达3e5那么大,因此算法至少要是O(nlogn)复杂度以下才可能达到要求。
考虑采用Splay解决(这样的题目只能用这种动态维护的树结构不是么?)
HDU 3487 Play with Chain | Splay
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原文地址:http://www.cnblogs.com/jcf94/p/4374315.html