1307: City Tour Time Limit: 1 Sec  Memory Limit: 128 MB [Submit][Status][Web Board] Description Alice想要从城市A出发到城市B,由于Alice最近比较穷(不像集训队陈兴老师是个rich second),所以只能选择做火车从A到B.不过Alice很讨厌坐火车,火车上人比较多,比较拥挤,所以Alice有很严格的要求:火车的相邻两站间的最大距离尽可能的短,这样Alice就可以在停站的时候下车休息一下.当…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5013 题意: 思路: 这里有错,是Hi(x)=sigama(Hji)(j属于x) const int N=18; int m,n; double p[N],H[N][N]; double f[N][1<<N]; double dp[N][1<<N]; double a[1<<N],aa[1<<N]; double pp[1<<N],qq[1<&…

Description Alice想要从城市A出发到城市B,由于Alice最近比较穷(不像集训队陈兴老师是个rich second),所以只能选择做火车从A到B.不过Alice很讨厌坐火车,火车上人比较多,比较拥挤,所以Alice有很严格的要求:火车的相邻两站间的最大距离尽可能的短,这样Alice就可以在停站的时候下车休息一下.当然Alice希望整个旅途比较短. Input 有多组测试数据. 每组测试数据的第一行有两个整数N,M,A,B(N<=2000, M<=50000, N >=2,…

1307: City Tour Submit Page   Summary   Time Limit: 1 Sec     Memory Limit: 128 Mb     Submitted: 593     Solved: 148 Description Alice想要从城市A出发到城市B,由于Alice最近比较穷(不像集训队陈兴老师是个rich second),所以只能选择做火车从A到B.不过Alice很讨厌坐火车,火车上人比较多,比较拥挤,所以Alice有很严格的要求:火车的相邻两站间的…

A: Decimal Time Limit: 1 Sec   Memory Limit: 128 MB Submit: 99   Solved: 10 [ Submit][ Status][ Web Board] Description 任意一个分数都是有理数,对于任意一个有限小数,我们都可以表示成一个无限循环小数的形式(在其末尾添加0),对于任意一个无限循环小数都可以转化成一个分数.现在你的任务就是将任意一个无限循环小数转化成既约分数形式.所谓既约分数表示,分子和分母的最大公约数是1. Inp…

Detroit is beautiful-though you probably have to be a child of the industrial Midwest, like me, to see it. As you may have heard, the city is in trouble. At the end of the 2013 fiscal year, Detroit had a balance sheet with liabilities of $9.05 billio…

Sightseeing tour Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9276   Accepted: 3924 Description The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists can see every corner of the beauti…

Sightseeing tour Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 8859   Accepted: 3728 Description The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists can see every corner of the beauti…

Sightseeing tour Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 6986   Accepted: 2901 Description The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists can see every corner of the beauti…

Sightseeing tour   Description The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists can see every corner of the beautiful city. They want to construct the tour so that every street in the city is vis…