C. Report time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Each month Blake gets the report containing main economic indicators of the company "Blake Technologies". There are n commodi…

题意: 给定序列,将前a个数进行逆序或正序排列,多次操作后,求最终得到的序列. 分析: 仔细分析可以想到j<i,且rj小于ri的操作是没有意义的,对于每个i把类似j的操作删去(这里可以用multiset或者直接模拟栈的操作),最后我们会获得一个严格下降的序列即ri>rj && i<j,并且相邻的t不相等. 那么对于ri,ri+1,对[0,ri)进行排序后,又对其子序列[0,ri+1)进行相反的排序,其实只有区间[ri+1,ri−1]]内的数是按照ti规定的排序的,并且不会…

题目链接 按题目给出的r, 维护一个递减的数列,然后在末尾补一个0. 比如样例给出的 4 21 2 4 32 31 2 递减的数列就是3 2 0, 操作的时候, 先变[3, 2), 然后变[2, 0), 具体的过程看代码.   #include <iostream> #include <vector> #include <cstdio> #include <cstring> #include <algorithm> #include <cm…

C. Report time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Each month Blake gets the report containing main economic indicators of the company "Blake Technologies". There are n commodi…

题目链接 题目大意:给定序列, 给定若干操作, 每次操作将$[1,r]$元素升序或降序排列, 求操作完序列 首先可以发现对最后结果有影响的序列$r$一定非增, 并且是升序降序交替的 可以用单调栈维护这些序列, 再考虑最后如何通过这些序列恢复数组 因为序列是升降交替的, 保存一个排序好的序列, 每次从两端取出元素添加即可 #include <iostream> #include <algorithm> #include <cstdio> #include <vect…

Fox and Cross Time Limit: 1000MS   Memory Limit: 262144KB   64bit IO Format: %I64d & %I64u Submit Status Description Fox Ciel has a board with n rows and n columns. So, the board consists of n × n cells. Each cell contains either a symbol '.', or a s…

Rebranding Problem Description The name of one small but proud corporation consists of n lowercase English letters. The Corporation has decided to try rebranding - an active marketing strategy, that includes a set of measures to change either the bra…

B. Cards time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Catherine has a deck of n cards, each of which is either red, green, or blue. As long as there are at least two cards left, she can…

B. Barnicle time limit per test: 1 second memory limit per test :256 megabytes input: standard input output: standard output Barney is standing in a bar and starring at a pretty girl. He wants to shoot her with his heart arrow but he needs to know th…

活生生打成了大模拟... #include <bits/stdc++.h> using namespace std; typedef long long LL; typedef unsigned long long ULL; typedef pair<int,int>PII; const double eps=1e-5; const double pi=acos(-1.0); //const int mod=1e9+7; const int INF=0x3f3f3f3f; //ht…