Arrange Time Limit: 8000/4000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others) Problem Description Accidentally, Cupid, god of desire has hurt himself with his own dart and fallen in love with Psyche. This has drawn the fury of his mot…

A数组显示从0到i的最小值B数组显示从0到i的最大值由此可得:A数组是单调不增的(怎么也会不使得最小值变大)B数组是单调不减的.设premin和premax为i位以前的最小值和最大值.可以得出以下几点:1.第一位,A数组和B数组定然相同,否则无解2.当A[i]>B[i] 无解3.当A[i]<premin,更新最小值,同时意味着这意味只能放A[i],当B[i]>premax,同样操作,当如果两者同时发生,说明有冲突,无解4.当A[i]==premin&&B[i]==prem…

根据条件,某些位置的数字就可以确定了.确定过程中如果有冲突,则无解. 如果B中出现了递增,C中出现了递减,则无解. 对于每一个未确定的a[i],ans需要更新,ans=ans*((c[i]-b[i]+1)-(i-1))%MOD; 如果计算ans过程中,出现了(c[i]-b[i]+1)-(i-1)<=0,则也是无解. #include<cstdio> #include<cstring> #include<cmath> #include<vector> #…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5719 题意:一个数列为1~N的排列,给定mn[1...n]和mx[1...n],问有符合的排列数为多少?如果不存在,输出0: 思路: 有解的几种条件: 1. mn , mx 变化单调: 2. mn,mx 不能同时变化: 3. 一个位置可选的个数>0; 当解存在时,递推出每次可选择的个数,num += mx[i] - mx[i-1] + mn[i-1] - mn[i] - 1; 即可: 坑:开始想成了…

Arrange Accepts: 221 Submissions: 1401 Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others) 问题描述 Cupid一不小心将爱情之箭射到了自己,他爱上了Psyche. 这引起了他的母亲Venus的注意.Venus将Psyche带到了一堆打乱的谷堆旁. 这儿共有n 堆稻谷,编号为1 到n.Psyche需要将这些谷堆以某种顺序排列,设最终排在第i 位的…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3743 Frosh Week Time Limit : 2000/1000ms (Java/Other)   Memory Limit : 32768/32768K (Java/Other) Total Submission(s) : 5   Accepted Submission(s) : 1 Font: Times New Roman | Verdana | Georgia Font Size: …

ACboy needs your help Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4912    Accepted Submission(s): 2651 Problem Description ACboy has N courses this term, and he plans to spend at most M days…

Eight Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 30176   Accepted: 13119   Special Judge Description The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen it. It is constructed with 15…

 Danganronpa(弹丸论破) Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Description 题目描述 Chisa Yukizome works as a teacher in the school. She prepares many gifts, which consist of n kinds with a[i] quantities of each ki…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1043 The 15-puzzle has been around for over 100 years; even if you don't know it by that name, you've seen it. It is constructed with 15 sliding tiles, each with a number from 1 to 15 on it, and all pack…