题目链接:hdu 3410 Passing the Message 题意: 说那么多,其实就是对于每个a[i],让你找他的从左边(右边)开始找a[j]<a[i]并且a[j]=max(a[j])(k+1<j<i),a[k]>a[i]. 题解: 从左往右维护一个递减的单调队列,每次都从尾巴开始把比a[i]的踢掉,最后踢的那个就是答案. 右边同理. #include<bits/stdc++.h> #define F(i,a,b) for(int i=a;i<=b;i++…

Passing the Message What a sunny day! Let’s go picnic and have barbecue! Today, all kids in “Sun Flower” kindergarten are prepared to have an excursion. Before kicking off, teacher Liu tells them to stand in a row. Teacher Liu has an important messag…

可以先处理出每个a[i]最左和最右能到达的位置,L[i],和R[i].然后就只要询问区间[ L[i],i-1 ]和区间[ i+1,R[i] ]最大值位置即可. #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> #include<vector> #include<map> #include<set> #include<queue…

http://acm.hdu.edu.cn/showproblem.php?pid=3410 Passing the Message Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 827    Accepted Submission(s): 546 Problem Description What a sunny day! Let’s…

Passing the Message http://acm.hdu.edu.cn/showproblem.php?pid=3410 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1051    Accepted Submission(s): 683 Problem Description What a sunny day! Let’s…

题意: 给定n长的数组(下标从1-n)(n个人的身高,身高各不同样 问:对于第i个人,他能看到的左边最矮的人下标.(假设这个最矮的人被挡住了,则这个值为0) 还有右边最高的人下标,同理若被挡住了则这个值为0 输出n行,每一个人左右2边的下标. 单调队列,对于 front - rear 的队列(注意出队都是在rear,入队也是在rear) 当增加元素x,若这队列是单调递增的,显然q.front() <= x , 反之若>x ,则把队首元素弹掉,这样就能保持单调性. 若弹掉了队首元素,在此题中就相…

Clairewd’s message 题意:先一个转换表S,表示第i个拉丁字母转换为s[i],即a -> s[1];(a为明文,s[i]为密文).之后给你一串长度为n<= 100000的前面为密文后面为明文的串:让你通过密码转换表S在这个串的后面添加字符,使得前面的密文翻译成明文之后与后面相对应,最后输出添加字符后的串(前面密文照常输出): Sample Input 2 abcdefghijklmnopqrstuvwxyz abcdab qwertyuiopasdfghjklzxcvbnm q…

题意: 给出一个数组,问你对于第i个数,从最后一个比它大的数到它之间比它小的数中最大的那个数的下标,以及它右边到第一个比它大的数中比它小的数中最大的那一个数的下标<下标从1开始>. eg:5 2 4 3 1  l    0 0 2 0 0        对5来说左边比它小的数没有,所以是0.对2来说左边比它小的数没有,所以是0.对4来说左边比它小的数是2,所以下标是2.  r   3 0 4 5 0         对5来说右边比它小的数中最大的是4,是第3个,所以答案是3.对2来说右边比它小…

What a sunny day! Let’s go picnic and have barbecue! Today, all kids in “Sun Flower” kindergarten are prepared to have an excursion. Before kicking off, teacher Liu tells them to stand in a row. Teacher Liu has an important message to announce, but s…

Isabella's Message Time Limit: 20 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4119 Description Isabella and Steve are very good friends, and they often write letters to each other. They exchange funny experiences, talk ab…