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…
转载请注明出处: http://www.cnblogs.com/fraud/ ——by fraud Always an integer Time Limit:3000MS Memory Limit:0KB 64bit IO Format:%lld & %llu Combinatorics is a branch of mathematics chiefly concerned with counting discrete objects. For instanc…
要back的题目 目标是全绿!back一题删一题! acmm7 1003 1004 acmm8 1003 1004 sysu20181013 Stat Origin Title Solved A Gym 100624A Kingdoms B Gym 100624B Who wants to live forever? Solved C Gym 100624C Chemist's vows D Gym 100624D Non-boring sequences Attempted E Gym…
UVA 1394 And Then There Was One / Gym 101415A And Then There Was One / UVAlive 3882 And Then There Was One / POJ 3517 And Then There Was One / Aizu 1275 And Then There Was One (动态规划,思维题) Description Let's play a stone removing game. Initially, n ston…
目录 @description@ @solution@ @accepted code@ @details@ @description@ 给定 N 个点以及 P 条单向道路 Ai -> Bi,每条道路有 Ri 块石头(保证\(0 \le \lfloor\frac{Bi}{4}\rfloor-\lfloor\frac{Ai}{4}\rfloor\le 1\)). 接下来 D 天每天有一个询问,分为三类: (1)给定 X, Y, Z,修建一条 X -> Y 且有 Z 块石头的道路. (2)给定 X,…
Gym 101047M Removing coins in Kem Kadrãn Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Practice Description standard input/output Andréh and his friend Andréas are board-game aficionados. They know many of their friend…
Gym 101047K Training with Phuket's larvae Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Practice Description standard input/output Thai cuisine is known for combining seasonings so that every dish has flavors that are…
Gym 101047E Escape from Ayutthaya Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Practice Description standard input/output Ayutthaya was one of the first kingdoms in Thailand, spanning since its foundation in 1350 to…
Gym 101047B Renzo and the palindromic decoration Time Limit:2000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Practice Description standard input/output At the ruins of Wat Phra Si Sanphet (วดพระศรสรรเพชญ), one can find famous inscr…