Pavel is developing another game. To do that, he again needs functions available in a third-party library too famous to be called. There are mm functions numbered from 11to mm, and it is known that the ii-th version of the library contains functions…
题目链接: Gym Class Time Limit: 6000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description 众所周知,度度熊喜欢各类体育活动. 今天,它终于当上了梦寐以求的体育课老师.第一次课上,它发现一个有趣的事情.在上课之前,所有同学要排成一列, 假设最开始每个人有一个唯一的ID,从1到N,在排好队之后,每个同学会找出包括自己在内的前方所有同学的最小ID,…
题意:给定一个序列,让你经过不超过9的6次方次操作,变成一个有序的,操作只有在一个连续区间,交换前一半和后一半. 析:这是一个构造题,我们可以对第 i 个位置找 i 在哪,假设 i 在pos 位置,那么如果 (pos-i)*2+i-1 <= n,那么可以操作一次换过来, 如果不行再换一种,如果他们之间元素是偶数,那么交换 i - pos,如果是奇数,交换 i - pos+1,然后再经过一次就可以换到指定位置. 代码如下: #pragma comment(linker, "/STACK:1…
Shopping 题目连接: http://codeforces.com/gym/100803/attachments Description Your friend will enjoy shopping. She will walk through a mall along a straight street, where N individual shops (numbered from 1 to N) are aligned at regular intervals. Each shop…
F. Doomsday Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100187/problem/F Description Doomsday comes in t units of time. In anticipation of such a significant event n people prepared m vaults in which, as they think, it will…