klc的博客

Lucky Coins SequenceTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 921    Accepted Submission(s): 488Problem DescriptionAs we all know,every co...

hdu 1166 敌兵布阵 树状数组

hdu 1541 Stars 树状数组

HDU 2852 二分+树状数组

哥德巴赫猜想大家都知道一点吧.我们现在不是想证明这个结论,而是想在程序语言内部能够表示的数集中,任意取出一个偶数,来寻找两个素数,使得其和等于该偶数. 做好了这件实事,就能说明这个猜想是成立的. 由于可以有不同的素数对来表示同一个偶数,所以专门要求所寻找的素数对是两个值最相近的.

hdu 1286 找新朋友 欧拉函数 新年快到了，“猪头帮协会”准备搞一个聚会，已经知道现有会员N人，把会员从1到N编号，其中会长的号码是N号，凡是和会长是老朋友的，那么该会员的号码肯定和N有大于1的公约数，否则都是新朋友，现在会长想知道究竟有几个新朋友？请你编程序帮会长计算出来。

hdu 4715 Difference Between Primes 筛法 All you know Goldbach conjecture.That is to say, Every even integer greater than 2 can be expressed as the sum of two primes. Today, skywind present a new conjecture: every even integer can be expressed as the differen

hdu 2710 Max Factor 筛法 To improve the organization of his farm, Farmer John labels each of his N (1 <= N <= 5,000) cows with a distinct serial number in the range 1..20,000. Unfortunately, he is unaware that the cows interpret some serial numbers as better