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oracle性能检测sql语句
1. 监控事例的等待 select event,sum(decode(wait_Time,0,0,1)) "Prev",sum(decode(wait_Time,0,1,0)) "Curr",count(*) "Tot" from v$session_Wait group by event orde...
分类:数据库   时间:2014-06-27 19:18:03    阅读次数:273
OCP-1Z0-051-题目解析-第7题
7. Which twostatements are true regarding the USING and ON clauses in table joins? (Choose two.)A. Both USING and ON clauses can be used for equijoins...
分类:其他好文   时间:2014-06-26 16:40:39    阅读次数:801
Leetcode Add Binary
Given two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".class Solution {public: string addBinary(str...
分类:其他好文   时间:2014-06-26 15:52:27    阅读次数:159
Leetcode Combination Sum II
Given a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Each number ...
分类:其他好文   时间:2014-06-26 15:45:49    阅读次数:163
Leetcode Maximum Subarray
Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array[?2,1,?3,4,?1,2,1,...
分类:其他好文   时间:2014-06-26 15:10:47    阅读次数:168
BZOJ:3209: 花神的数论题
今天居然没参考任何资料解决了这道数位DP,事先只是搞一道数论题练练;思路:求SUM[1]-SUM[N]的二进制的乘积mod1000000007; N#include#include#includeusing namespace std;#define N 10000007typedef long.....
分类:其他好文   时间:2014-06-26 15:09:30    阅读次数:221
LeetCode:Combinations
Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. For example, If n = 4 and k = 2, a solution is: [ [2,4], [3,4], [2,3], [1,2], [1,3...
分类:其他好文   时间:2014-06-26 14:06:02    阅读次数:252
uva10487
#include #include using namespace std; int n,m,k,cases,sum,arr[1005],S[1000000]; void calsum(){ k=0; for (int i=0;i<n-1;i++){ for (int j=i+1;j<n;j++){ S[k++]=arr[i]+arr[j]; } } sort(S,S...
分类:其他好文   时间:2014-06-26 10:51:01    阅读次数:198
【JAVA】merge two array by order
merge two array by order...
分类:编程语言   时间:2014-06-26 08:16:05    阅读次数:246
HDU 4336 Card Collector(动态规划-概率DP)
HDU 4336 Card Collector(动态规划-概率DP) 题目大意: 有n个卡片,你现在买一包方便面,没包方便面出现其中一个卡片的概率为 p[i] ,问你集齐一套卡片需要的张数的数学期望。 解题思路: 概率DP,用位进制0表示这个卡片有了,1表示这个卡片还没有,那么 例如 “3” 用二进制表示 “1 1” 那么 数组 dp[3] 记录的就是 1号卡片和2号卡片都有的情况集齐一套卡片需要的张数的数学期望。 dp[sum]= ( 1+sum { dp[ sum + (1<<j )] *p[j] ...
分类:其他好文   时间:2014-06-26 08:04:18    阅读次数:377
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