【题目】
A sequence of N positive integers (10 N , each of them less than or equal 10000, and a positive integer S (S <
100 000 000) are given. Write a program to find the minimal length of the subse...
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其他好文 时间:
2014-05-15 07:58:17
阅读次数:
329
Humble Numbers
题目描述
A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 25, 27, ... shows the fi...
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其他好文 时间:
2014-05-15 01:36:22
阅读次数:
230
Integers1, 2, 3,...,nare placed on a circle in
the increasing order as in the following figure. We want to construct a sequence
from these numbers on ...
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其他好文 时间:
2014-05-14 02:54:10
阅读次数:
354
题目来源:POJ 2478 Farey Sequence
题意:输入n 求 phi(2)+phi(3)+phi(4)+...+phi(n)
思路:用类似筛法的方式计算phi(1), phi(2), ..., phi(n) 再求前缀和
#include
#include
#include
//欧拉phi函数
const int maxn = 1000010;
typedef long...
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其他好文 时间:
2014-05-14 01:05:22
阅读次数:
323
DNA Sorting
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 80359
Accepted: 32327
Description
One measure of ``unsortedness'' in a sequence is the number of ...
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其他好文 时间:
2014-05-13 23:34:18
阅读次数:
303
Gao The SequenceTime Limit:2 Seconds Memory
Limit:65536 KBYou are given a sequence of integers,A1,A2,...,An. And you are
allowed a manipulation on the...
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其他好文 时间:
2014-05-13 19:49:14
阅读次数:
277
Cut the Sequence
Time Limit: 2000MS
Memory Limit: 131072K
Total Submissions: 8764
Accepted: 2576
Description
Given an integer sequence { an } of length N, you are to ...
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其他好文 时间:
2014-05-13 16:04:29
阅读次数:
267
You are given a sequence of integers, A1,A2,...,An. And you are allowed a manipulation on the sequence to transform the origin sequence into another sequence B1,B2,...,Bn(Maybe the two sequences are s...
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其他好文 时间:
2014-05-13 13:45:10
阅读次数:
327
这道题还挺好的,如果你的思路是每次生成一个全排列,然后累计到k次,那么停下来吧,肯定超时了亲。。
微软今年的笔试题里有一道类似的,我之前已经提到过了,是只有0和1的字符串,求第k个排列是什么样子的。这道题比那个要难一些,但是总体的思路是一样的。假设有n个数要组成排列,求第k个排列。像填表一样,从高位往地位,逐个填写。先考虑有n-1个数要组成排列,最多有(n-1)!种情况,当第n个数加入后,第n个...
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其他好文 时间:
2014-05-13 13:42:02
阅读次数:
246
Max Sum of Max-K-sub-sequence
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 5690 Accepted Submission(s): 2059
Problem Description
...
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其他好文 时间:
2014-05-13 11:38:49
阅读次数:
256