先上题目：Find NumbersTime Limit: 10000/5000 MS
(Java/Others)Memory Limit: 32768/32768 K (Java/Others)Total Submission(s):
26Accepted Submission(s): 20Spec...
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其他好文 时间：
2014-06-02 17:15:22
阅读次数：
267
问题：
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], [3,1,2],
and [3,2,1].
分析：
...
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其他好文 时间：
2014-06-01 15:04:42
阅读次数：
259
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Description
Given N numbers, X1,
X2, ... , XN, let us calculate the difference of every pair of numbers: ∣Xi
- Xj∣ (1 ≤ i
＜ j ≤ N). We can get C(N,2) differences through this work, and no...
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其他好文 时间：
2014-06-01 14:07:56
阅读次数：
347
问题：
Given a collection of numbers that might contain duplicates, return all possible unique permutations.
For example,
[1,1,2] have the following unique permutations:
[1,1,2], [1,2,1],
and...
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其他好文 时间：
2014-06-01 13:03:12
阅读次数：
324
题目链接：http://poj.org/problem?id=3252题意：给出一个二进制区间，求出0的个数不小于1的个数这样的二进制个数解法：数位DP，定义状态dp[len][num_zero][num_one]，num_zero
定义为写0的个数。 1 #include 2 #include 3...
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其他好文 时间：
2014-06-01 12:06:33
阅读次数：
191
In the 2020 grid below, four numbers along a diagonal line have been marked in red.
08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08
49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 ...
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其他好文 时间：
2014-06-01 10:04:38
阅读次数：
419
title:
A Pythagorean triplet is a set of three natural numbers, a
b
c, for which,
a2 + b2 =
c2
For example, 32 + 42 = 9 + 16 = 25 = 52.
There exists exactly one Pythagorean triplet for wh...
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其他好文 时间：
2014-06-01 09:17:53
阅读次数：
251
【题目】
A message containing letters from A-Z is being encoded to numbers using the following mapping:
'A' -> 1
'B' -> 2
...
'Z' -> 26
Given an encoded message containing digits, determine the total number of ways to decode it.
For example,
Given encoded ...
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其他好文 时间：
2014-06-01 08:59:37
阅读次数：
258
title:
Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.
37107287533902102798797998220837590246510135740250
4637693767749000971264812489697007805041701826053...
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其他好文 时间：
2014-06-01 08:53:33
阅读次数：
276
Description
T. Chur teaches various groups of students at university U. Every U-student has a unique Student Identification Number (SIN). A SIN s is an integer in the range 0 ≤ s ≤ MaxSIN with MaxS...
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其他好文 时间：
2014-06-01 07:40:18
阅读次数：
248
