lhh的博客

题目链接(http://www.51nod.com/onlineJudge/questionCode.html#!problemId=1010)题解：因子只包含2 3 5的数为丑数，求出丑数打表，然后二分查找找到满足条件的数。代码：#include<iostream>#include<stdio.h>#include<algorithm&a

题目链接题解：对结果进行二分，就是找满足条件的数而不是它的位置。左右边界是数的最大乘积和最小乘积。代码：#include<iostream>#include<stdio.h>#include<algorithm>using namespace std;const int MAX_N=5e4+10;typedef long long LL;LL...

The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how many quadruplet (a, b, c, d ) ∈ A x B x C x D are such that a + b + c + d = 0 . In the following, we assume that all lists have the same size n .

Farmer John has built a new long barn, with N (2 <= N <= 100,000) stalls. The stalls are located along a straight line at positions x1,...,xN (0 <= xi <= 1,000,000,000).

在一个非降序列中，查找与给定值最接近的元素。输入第一行包含一个整数n，为非降序列长度。1 <= n <= 100000。第二行包含n个整数，为非降序列各元素。所有元素的大小均在0-1,000,000,000之间。

给出若干个整数，询问其中是否有一对数的和等于给定的数。输入共三行：第一行是整数n(0 < n <= 100,000)，表示有n个整数。第二行是n个整数。整数的范围是在0到10^8之间。第三行是一个整数m（0 <= m <= 2^30)，表示需要得到的和。