Given a collection of numbers, return all
possible permutations.For example,[1,2,3]have the following
permutations:[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,...
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其他好文 时间:
2014-05-27 02:42:35
阅读次数:
202
Questin:There is an array A[N] of N numbers.
You have to compose an array Output[N] such that Output[i] will be equal to
multiplication of all the ele...
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其他好文 时间:
2014-05-23 23:48:14
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429
A -LuckyTime Limit:1000MSMemory
Limit:131072KB64bit IO Format:%lld & %lluSubmitStatusPracticeNENU
1081Description We say a n*m matrix r is lucky if...
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其他好文 时间:
2014-05-23 09:01:25
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304
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a link...
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其他好文 时间:
2014-05-23 07:43:23
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246
题目链接:11481 - Arrange the Numbers
题意:序列1-n,进行重排,问最后前m个中有k个仍然位置不变的情况数
思路:之前写过UVA 580, n个数重排,要求每个位置都不同的情况的题目,递推式为dp[i] = (i - 1) * (dp[i - 1] + dp[i - 2])
利用这个,这题只要:
k个位置C(m, k) * sum(C[n - m][i] (后面...
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其他好文 时间:
2014-05-22 10:45:52
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191
??
Terrible Sets
Time Limit: 1000MS
Memory Limit: 30000K
Total Submissions: 2999
Accepted: 1549
Description
Let N be the set of all natural numbers {0 , 1 , 2 , . . . ...
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其他好文 时间:
2014-05-22 09:52:10
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283
1 使用First()/FirstOrDefault()、Last()/LastOrDefault()方法返回序列中的第一个或者最后一个元素时,应该确保序列已经被正确排序。
int[] numbers = { 3, 1, 23, 10, 5, 12, 7, 2, 4};
int first = numbers.First(); //输出3
int firstOrdered = numbers.O...
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其他好文 时间:
2014-05-22 07:35:10
阅读次数:
196
【题目】
Write a program to solve a Sudoku puzzle by filling the empty cells.
Empty cells are indicated by the character '.'.
You may assume that there will be only one unique solution.
A sudoku puzzle...
...and its solution numbers marked in red.
...
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其他好文 时间:
2014-05-20 17:07:34
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335
You are given two linked lists representing two
non-negative numbers. The digits are stored in reverse order and each of their
nodes contain a single ...
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其他好文 时间:
2014-05-19 12:05:23
阅读次数:
386