Median 题目链接: http://acm.split.hdu.edu.cn/showproblem.php?pid=5857 Description There is a sorted sequence A of length n. Give you m queries, each one contains four integers, l1, r1, l2, r2. You should use the elements A[l1], A[l1+1] ... A[r1-1], A[r1]…

因为原序列是排列好了的,那么只要看一下给出的两个区间相交的情况,然后分类讨论一下,O(1)输出. #pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> #include<vector> #include<map> #i…

求$(a^n-1,a^m-1) \mod k$,自己手推,或者直接引用结论$(a^n-1,a^m-1) \equiv a^{(n,m)}-1 \mod k$ /** @Date : 2017-09-21 21:41:26 * @FileName: HDU 2685 结论 定理 推导.cpp * @Platform: Windows * @Author : Lweleth (SoungEarlf@gmail.com) * @Link : https://github.com/ * @Version…

从今天开始就有各站网络赛了 今天是ccpc全国赛的网络赛 希望一切顺利 可以去一次吉大 希望还能去一次大连 题意: 很明确是让你求Sn=[a+sqrt(b)^n]%m 思路: 一开始以为是水题 暴力了一发没过 上网看了一下才知道是快速幂 而且特征方程的推导简直精妙 尤其是共轭相抵消的构造 真的是太看能力了 (下图转自某大神博客) 特征方程是C^2=-2*a*C+(a*a-b) 然后用快速幂求解 临时学了下矩阵快速幂 从这道题能看出来 弄ACM真的要数学好 这不是学校认知的高数 线代 概率分数 而…

Median Filter Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1092    Accepted Submission(s): 269 Problem Description Median filter is a cornerstone of modern image processing and is used extens…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2298 #include<bits/stdc++.h> using namespace std; const double pi=acos(-1.0); const double g=9.8; ; int main() { int t; scanf("%d",&t); while (t--) { double x,y,v; scanf("%lf%lf%lf&qu…

首先说一下.N*(N-1)/2为三角形数,随意一个自然数都最多可由三个三角形数表示. 对于,对于给定的要求值 V, 那么其一组解可表示为 V = 6*(K个三角形数的和)+K: 即随意由k个数组成的解 都有 (V-K)%6==0; 那么仅仅须要找到最小的K(1,2须要特判,结论最小值为3): 在对2进行特判时候,能够从两端到中间的线性扫描来做. #include <cstdio> #include <cstring> #include <algorithm> #incl…

Median HDU - 5857 There is a sorted sequence A of length n. Give you m queries, each one contains four integers, l1, r1, l2, r2. You should use the elements A[l1], A[l1+1] ... A[r1-1], A[r1] and A[l2], A[l2+1] ... A[r2-1], A[r2] to form a new sequenc…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=3282 Running Median Description For this problem, you will write a program that reads in a sequence of 32-bit signed integers. After each odd-indexed value is read, output the median (middle value) of th…

Acperience 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5734 Description Deep neural networks (DNN) have shown significant improvements in several application domains including computer vision and speech recognition. In computer vision, a particul…