Bus Fair Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 600    Accepted Submission(s): 293 Problem Description You are now in Foolish Land. Once moving in Foolish Land you found that there is…

今天玩魔灵玩多了,耽误了时间,回去宿舍又没电. /*********************************************/ Bus Fair Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 900    Accepted Submission(s): 444 Problem Description You are no…

HDU 4046 Panda (ACM ICPC 2011北京赛区网络赛) Panda Time Limit: 10000/4000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1816    Accepted Submission(s): 632 Problem Description When I wrote down this letter, you may have…

hdu 5552 Bus Routes 考虑有环的图不方便,可以考虑无环连通图的数量,然后用连通图的数量减去就好了. 无环连通图的个数就是树的个数,又 prufer 序我们知道是 $ n^{n-2} $ 其中又由于有 $ n-1 $ 个边,每个边可以涂色,所以总共无环的方案数量是 $ m^{n-1} n^{n-2} $ 那么现在就要算连通图的数量了.这个不如不连通图的数量好算. 不连通图的数量怎么算呢,原本想的是容斥,但是貌似不好实现,看了题解发现一种神仙思路.考虑固定一个点,并且让这个点连出一…

http://acm.hdu.edu.cn/showproblem.php?pid=5441 Travel Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2061    Accepted Submission(s): 711 Problem Description Jack likes to travel around the wo…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1690 Bus System Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6569    Accepted Submission(s): 1692 Problem Description Because of the huge popula…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5493 题目大意: N个人,每个人有一个唯一的高度h,还有一个排名r,表示它前面或后面比它高的人的个数,求按身高字典序最小同时满足排名的身高排列. 题目思路: [线段树] 首先可以知道,一个人前面或后面有r个人比他高,那么他是第r+1高或第n-i-r+1高,i为这个人是第几高的. 所以先将人按照身高从小到大排序,接下来,把当前这个人放在第k=min(r+1,n-i-r+1)高的位置. 用线段树维护包…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4747 思路: 比赛打得太菜了,不想写....线段树莽一下 实现代码: #include<iostream> #include<cstdio> #include<map> #include<cmath> using namespace std; #define lson l,m,rt<<1 #define rson m+1,r,rt<<1|…

http://acm.hdu.edu.cn/showproblem.php?pid=5444 Elven Postman Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 939    Accepted Submission(s): 520 Problem Description Elves are very peculiar crea…

链接: http://acm.hdu.edu.cn/showproblem.php?pid=5455 Fang Fang Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 233    Accepted Submission(s): 110 Problem Description Fang Fang says she wants to be…