Arithmetic Sequence Description Giving a number sequence A with length n, you should c
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2016-05-17 18:02:00
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hdu 5400 Arithmetic Sequence 分析: 首先预处理出来出ii这个位置向前d_1 d1的等差序列; 向后d_2 d2的等差数列能延续到多长,记作l_i,r_i li,ri 假设d_1!=d_2 d1≠d2,那么枚举中间位置。答案为l_i*r_i li∗ri 假设
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2021-08-06 16:01:40
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HDU 5400 Arithmetic Sequence
/**
HDU 5400 Arithmetic Sequence
直接预处理求解就好了
预处理找出以a[i]结尾最长的subArr长度(满足条件的)
*/
#include<algorithm>
#include<iostream>
#include<cstring>
#include<cs
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2017-05-29 21:13:00
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hdu 5400 Arithmetic Sequence
分析:
首先预处理出来出ii这个位置向前d_1 d1的等差序列;
向后d_2 d2的等差数列能延续到多长,记作l_i,r_i li,ri
假设d_1!=d_2 d1≠d2。那么枚举中间位置,答案为l_i*r_i li∗ri
假设d_1 =d_2 d1=d2,枚举開始位置,答案为r_i
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2017-07-02 15:32:00
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Problem DescriptionA sequence b1,b2,⋯,bn are called (d1,d2)-arithmetic sequence if and only if there exist i(1≤i≤n) such that for every j(1≤ji),bj+1=bj+d1 and for every j(i≤jn),bj+1=bj+d2.
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2022-11-10 00:54:36
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//一个序列,两个公差d1,d2
//问有多少个区间使得这个区间存在一个点,它的左边是公差为d1的序列
//它的右边是公差为d2的序列
//直接存入每一个点向左和向右延伸的公差长度,乘一下即可
//还有就是注意一下d1=d2的情况
#include<cstdio>
#include<cstring>
#include<iostream>
using name
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2017-06-13 19:41:00
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题目传送门题意:问有多少个区间,其中存在j使得ai + d1 == ai+1(ij)构造:用c1[i], c2[i]记录i为标杆左边最多几个符合以及右边最多几个符合,那么i的贡献为(c1[i]+1) * (c2[i] + 1);当d1==d2时,找出符合的连续区间,长度记为cnt,那么贡献为(cnt...
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2015-08-19 13:18:00
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Problem DescriptionA sequence b1,b2,⋯,bn are called (d1,d2)-arithmetic sequence if and only if there exist i(1≤i≤n) such that for every j(1≤j 2 #inclu...
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2015-08-18 20:00:00
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Given an array A of integers, return the length of the longest arithmetic subsequence in A. Recall that a subsequence of A is a list A[i_1], A[i_2], .
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2020-02-03 11:42:00
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Problem J: Arithmetic SequenceTime Limit: 1 Sec Memory Limit: 128 MBSubmit: you s
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2016-05-15 21:19:27
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原题链接在这里:https://leetcode.com/problems/longest-arithmetic-sequence/ 题目: Given an array A of integers, return the length of the longest arithmetic subse
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2019-11-01 09:17:00
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题目链接:://acm.hdu.edu.cn/showproblem.php?pid=5400 题意:给定等差数列的差值d1,d2。问长度为n的数列中有多少个满足条件的子序列,条件为子序列中存在一个xi满足前半段是差值为d1的等差数列,后半段是差值为d2的等差数列 思路: 首先预处理出来出i
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2017-07-29 14:37:00
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Given an array of numbers arr. A sequence of numbers is called an arithmetic progression if the difference between any two consecutive elements is the
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2020-07-06 06:32:00
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Arithmetic Sequence
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2015-08-24 19:41:12
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DescriptionGiven an array of numbers arr. A sequence of numbers is called an arithmetic progression if the diffe
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2022-08-11 17:41:30
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http://codeforces.com/contest/382/problem/C题意:给你n个数,然后让你添加一个数使得n+1个数能形成这样的规律,a[1]-a[0]=a[2]-a[1]=a[3]-a[2].....,问这样的数有多少个?输出出来。 1 #include 2 #inclu...
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2014-12-31 20:27:00
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Pointer arithmetic for void pointer in C
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2021-08-11 14:14:58
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leetcode_easy_array 1502. Can Make Arithmetic Progression From Sequence solution #1: code 参考 1. leetcode_1502. Can Make Arithmetic Progression From Se
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2022-07-10 00:01:37
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题目链接:传送门 题意是给一个序列,让你自己加一个数到这个序列并排序,让这个序列成为等差数列。这个数可以有几个果等差值大于2
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2022-07-15 11:29:26
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题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5400题意:定义(d1,d2)算术序列为:对于给定的序列b1,b2,...,bn,存在i使得bj+1=bj+d1( j∈[1,i) );bj+1=bj+d2(j∈[i,n)).现在给出d1,d2和一个序列a1,a2,...,an,找出有多少个区间[l,r]满足(d1,d2)算术序列。解法:我们可
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2022-04-19 10:52:46
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