Jan's LightOJ :: Problem 1269 - Consecutive Sum 题意是,求给定序列的中,子序列最大最小的抑或和. 做法就是用一棵Trie树,记录数的每一位是0还是1.查询的时候,如果求最大值,就尽量让高位是1,相反就尽量让高位是0. 代码如下,1y: #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using names…

1269 - Consecutive Sum    PDF (English) Statistics Forum Time Limit: 3 second(s) Memory Limit: 64 MB Little Jimmy is learning how to add integers. As in decimal the digits are 0 to 9, it makes a bit hard for him to understand the summation of all pai…

题意:给出一串序列,求区间连续异或值的最大和最小. 思路:如果不是出在专题里,想不到可以用字典树做.先求前缀异或值,转为二进制,加入Trie树中,如果要求最大,就是尽可能走和当前位数字相反的,这样异或值才能保持最大,最小,就尽可能走和当前位数字相同的,走到尽头异或前缀值. /** @Date : 2016-11-10-16.34 * @Author : Lweleth (SoungEarlf@gmail.com) * @Link : https://github.com/ * @Version…

Consecutive Sum 又来水一发blog... 本来是昨天补codechef的题,最后一道题是可持久化字典树,然后去黄学长博客看了看 觉得字典树写法有点不太一样,就想着用黄学长的板子写码几道题吧... 最后发现...其实是可持久化字典树跟普通字典树写法不一样...我好傻逼... 区间异或和 可以先把前缀异或和插入到字典树中,然后去贪心 求最大值就是要求从高到低尽量不一样 高位不一样优先 用一个bit数组来存放好看多了 偷偷摸摸顺便学了快读板子...虽说可能没啥用... #include…

Consecutive sum II Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2523    Accepted Submission(s): 1219 Problem Description Consecutive sum come again. Are you ready? Go ~~1    = 0 + 12+3+4    =…

Problem Description Consecutive sum come again. Are you ready? Go ~~ 1 = 0 + 1 2+3+4 = 1 + 8 5+6+7+8+9 = 8 + 27 - You can see the consecutive sum can be representing like that. The nth line will have 2*n+1 consecutive numbers on the left, the first n…

the algorithm of three version below is essentially the same, namely, Kadane's algorithm, which is of O(n) complexity. https://en.wikipedia.org/wiki/Maximum_subarray_problem the evolution of the implementations is to remove redundancy and do what is…

树链剖分.. 样例太大了根本没法调...顺便把数据生成器放上来 -------------------------------------------------------------------------------- #include<cstdio> #include<cstring> #include<algorithm> #include<iostream>   #define rep( i , n ) for( int i = 0 ; i &l…

Codeforces Round #747 (Div. 2) A. Consecutive Sum Riddle 思路分析: 一开始想起了那个公式\(l + (l + 1) + - + (r − 1) + r = (l + r)(r - l + 1) / 2\). 然后一看令\(l + r = 1\)最合适,那么就有\(l = r - 1\),一代入就得到\(r = n, l = -n + 1\). 没想通为什么没有一眼看出来. 代码 #include <bits/stdc++.h> #def…

Codeforces Round #821(Div.2) (A-C) A.Consecutive Sum 大致题意 给定一组共 n 个数据 ,如果俩个数的下标在 mod k 意义下同余,则可以交换a[I] 和 a[j] ,求操作后一段连续的数的和的最大值. 基本思路 本题属于水题,因为 t 和 n 都比较小,所以可以直接暴力的把所有最大的数移到最前面的 k 个位置,即从最后 k 个数开始向前枚举比较,做冒泡排序即可. 代码 #include<bits/stdc++.h> using names…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 20050   Accepted: 10989 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…

题目链接: 传送门 Sum of Consecutive Prime Numbers Time Limit: 1000MS     Memory Limit: 65536K Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive intege…

POJ 2739 Sum of Consecutive Prime Numbers Time Limit:1000MS     Memory Limit:65536KB     64bit IO Format:%lld & %llu   Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representati…

POJ2739 Sum of Consecutive Prime Numbers 题目大意:给出一个整数,如果有一段连续的素数之和等于该数,即满足要求,求出这种连续的素数的个数 水题:艾氏筛法打表+尺取法区间推进,0ms水过(注意循环的终止条件) #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <ctime> #include &l…

 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 53 has two representations 5 + 7 + 11 + 13 + 17 and 5…

Given a positive integer N, how many ways can we write it as a sum of consecutive positive integers? Example 1: Input: 5 Output: 2 Explanation: 5 = 5 = 2 + 3 Example 2: Input: 9 Output: 3 Explanation: 9 = 9 = 4 + 5 = 2 + 3 + 4 Example 3: Input: 15 Ou…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 25225   Accepted: 13757 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…

Sum of Consecutive Prime Numbers http://poj.org/problem?id=2739 Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 28929   Accepted: 15525 Description Some positive integers can be represented by a sum of one or more consecutive prime numbe…

Time Limit: 1000MS   Memory Limit: 65536K Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 53 has two r…

Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 53 has two representations 5 + 7 + 11 + 13 + 17 and 53…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 19697   Accepted: 10800 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…

Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 53 has two representations 5 + 7 + 11 + 13 + 17 and 53…

POJ.2739 Sum of Consecutive Prime Numbers(水) 代码总览 #include <cstdio> #include <cstring> #include <vector> #include <cmath> #define nmax 10005 using namespace std; int prime[nmax],n; vector<int> vprime; void init() { memset(pri…

                                                                                                         Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 24498   Accepted: 13326 Description Some positive i…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 19895   Accepted: 10906 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…

解题思路:给定一个数,判定它由几个连续的素数构成,输出这样的种数 用的筛法素数打表 Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 20020   Accepted: 10966 Description Some positive integers can be represented by a sum of one or more consecutive…

POJ 2739 Sum of Consecutive Prime Numbers(素数) http://poj.org/problem? id=2739 题意: 给你一个10000以内的自然数X.然后问你这个数x有多少种方式能由连续的素数相加得来? 分析: 首先用素数筛选法把10000以内的素数都找出来按从小到大保存到prime数组中. 然后找到数X在prime中的上界, 假设存在连续的素数之和==X, 那么一定是从一个比X小的素数開始求和(不会超过X的上界),直到和sum的值>=X为止. 所…

Given a positive integer N, how many ways can we write it as a sum of consecutive positive integers? Example 1: Input: 5 Output: 2 Explanation: 5 = 5 = 2 + 3 Example 2: Input: 9 Output: 3 Explanation: 9 = 9 = 4 + 5 = 2 + 3 + 4 Example 3: Input: 15 Ou…

Given a positive integer N, how many ways can we write it as a sum of consecutive positive integers? Example 1: Input: 5 Output: 2 Explanation: 5 = 5 = 2 + 3 Example 2: Input: 9 Output: 3 Explanation: 9 = 9 = 4 + 5 = 2 + 3 + 4 Example 3: Input: 15 Ou…

题目如下: Given the head of a linked list, we repeatedly delete consecutive sequences of nodes that sum to 0 until there are no such sequences. After doing so, return the head of the final linked list.  You may return any such answer. (Note that in the e…