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poj 1528 Perfection
题目链接:http://poj.org/problem?id=1528题目大意:输入一个数n,然后求出约数的和sum,在与这一个数n进行比较,如果sum>n,则输出ABUNDANT,如果sum=n,则输出PERFECT,否则,输出DEFICIENT!注意1的结果是DEFICIENT,0的结果是END...
分类:其他好文   时间:2014-07-14 08:59:30    阅读次数:167
A. LCIS
A. LCISTime Limit:2000msCase Time Limit:2000msMemory Limit:32768KB64-bit integer IO format:%I64d Java class name:MainGiven n integers.You have two ope...
分类:其他好文   时间:2014-07-13 23:34:39    阅读次数:272
概率法求解三阶幻方[C语言]
#include #include int in[9]={1,2,3,4,5,6,7,8,9};int s[9];int re[3][3];int sum(int su[]){ int i,re=0; for(i=0;su[i];i++) re+=su[i]; ret...
分类:编程语言   时间:2014-07-13 22:08:59    阅读次数:342
Merge Sorted Array
Given two sorted integer arrays A and B, merge B into A as one sorted array. Note: You may assume that A has enough space (size that is greater or equal to m + n) to hold additional elements from ...
分类:其他好文   时间:2014-07-13 17:21:40    阅读次数:208
省赛i题/求1~n内所有数对(x,y),满足最大公约数是质数的对数
求1~n内所有数对(x,y),gcd(x,y)=质数,的对数。 思路:用f[n]求出,含n的对数,最后用sum【n】求和。 对于gcd(x,y)=a(设x 他们乘积的f[i*a]值包括i的欧拉函数值。时间复杂度(n*质数个数) #include #include using namespace std; const int maxx=100010; int mindiv[maxx+5],p...
分类:其他好文   时间:2014-07-13 16:45:50    阅读次数:177
Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example: Given the below binary tree and sum ...
分类:其他好文   时间:2014-07-13 13:58:01    阅读次数:184
LeetCode——Best Time to Buy and Sell Stock III
Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete at most two transactions. Note: You ma...
分类:其他好文   时间:2014-07-13 13:55:14    阅读次数:305
CTCI 4.7
Design an algorithm and write code to find the first common ancestory of two nodes in a binary tree. Avoid storing additional nodes in data structure....
分类:其他好文   时间:2014-07-13 13:24:21    阅读次数:279
CTCI 4.8
You have two very large binary trees: T1, with millions of nodes, and T2, with hundreds of nodes. Create an algorithm to decide if T2 is a subtree of ...
分类:其他好文   时间:2014-07-13 13:04:00    阅读次数:186
HDU 1016 Prime Ring Problem 题解
Problem Description A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of numbers in two adjacent circles should be a prime...
分类:其他好文   时间:2014-07-12 16:42:15    阅读次数:271
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