title:
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest positive number that is
evenly divisible by all of the nu...
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其他好文 时间:
2014-06-07 01:27:37
阅读次数:
229
title:
Largest palindrome product
Problem 4
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91
99.
Find the l...
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其他好文 时间:
2014-06-07 01:24:27
阅读次数:
398
title:
By listing the first six prime numbers: 2, 3, 5, 7, 11, and 13, we can see that the 6th prime is 13.
What is the 10 001st prime number?
翻译:
通过列出前6个质数,我们可知第6个质数是13。
那么第10001个质数是...
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其他好文 时间:
2014-06-05 12:28:28
阅读次数:
277
title:
The sum of the squares of the first ten natural numbers is,
12 + 22 + ... + 102 = 385
The square of the sum of the first ten natural numbers is,
(1 + 2 + ... + 10)2 = 552 = 3025
Hence ...
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其他好文 时间:
2014-06-05 12:03:29
阅读次数:
243
POJ 1715 Hexadecimal Numbers 组合数学
题目地址
题意:
一个十六进制,最多8位而且每一位都不能重复,求所有符合的数中第n大的数。注意不能有前导0。
分析:
可以发现,第i位的任何一个取值,都有P(unused, i - 1)个数字串,只要从高位向低位,从F到1找过去,看第n个是否在这个区间里面,如果没有的话就把那位置为0,然后找下一位就行了。...
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其他好文 时间:
2014-06-04 21:14:02
阅读次数:
272
24 Point game
时间限制:3000 ms | 内存限制:65535 KB
难度:5
描述
There is a game which is called 24 Point game.
In this game , you will be given some numbers. Your task is to find an expressi...
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其他好文 时间:
2014-06-04 21:06:57
阅读次数:
295
Terrible SetsTime Limit:1000MSMemory
Limit:30000KTotal Submissions:3017Accepted:1561DescriptionLet N be the set of
all natural numbers {0 , 1 , 2 , . ...
分类:
其他好文 时间:
2014-05-31 22:01:28
阅读次数:
325
题目:A Pythagorean triplet is a set of three
natural numbers, a b c, for which,a2 + b2 = c2For example, 32 + 42 = 9 + 16 = 25
= 52.There exists exactl.....
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其他好文 时间:
2014-05-31 01:23:03
阅读次数:
254
Given a strings, partitionssuch that every
substring of the partition is a palindrome.Return the minimum cuts needed for a
palindrome partitioning ofs...
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其他好文 时间:
2014-05-30 15:13:10
阅读次数:
262
Given a triangle, find the minimum path sum
from top to bottom. Each step you may move to adjacent numbers on the row
below.For example, given the fol...
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其他好文 时间:
2014-05-30 14:59:37
阅读次数:
241