The partial sum problem 时间限制:1000 ms | 内存限制:65535 KB 难度:2 描写叙述 One day,Tom's girlfriend give him an array A which contains N integers and asked him:Can you choose some integers from the N integers and the sum of them is equal to K. 输入 There are mul…
算法:搜索 描述 One day,Tom's girlfriend give him an array A which contains N integers and asked him:Can you choose some integers from the N integers and the sum of them is equal to K. 输入There are multiple test cases. Each test case contains three lines.The…
描述 One day,Tom’s girlfriend give him an array A which contains N integers and asked him:Can you choose some integers from the N integers and the sum of them is equal to K. 输入 There are multiple test cases. Each test ≤N≤),represents the array contains…
描述 One day,Tom’s girlfriend give him an array A which contains N integers and asked him:Can you choose some integers from the N integers and the sum of them is equal to K. 输入 There are multiple test cases. Each test case contains three lines.The fir…
Partial Sum Accepted : Submit : Time Limit : MS Memory Limit : KB Partial Sum Bobo has a integer sequence a1,a2,…,an of length n. Each time, he selects two ends ≤l<r≤n and add |∑rj=l+1aj|−C into a counter which is zero initially. He repeats the selec…
https://en.wikipedia.org/wiki/Subset_sum_problem In computer science, the subset sum problem is an important problem in complexity theory and cryptography. The problem is this: given a set (or multiset) of integers, is there a non-empty subset whose…
Sum Problem Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 338086 Accepted Submission(s): 85117 Problem Description Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge). In this pro…
The sum problem Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 12422 Accepted Submission(s): 3757 Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub…
We have a lot of ways to solve the maximum subsequence sum problem, but different ways take different time. 1.Brute-force algorithm int maxSubSum1(const vector<int> &a) { int maxSum=0; for(int i=0;i<a.size();i++) for(int j=i;j<a.size();j++…
The sum problem Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub-sequences that the sum of the sub-sequence is M. Input Input contains multiple test cases. each case contains two integers N, M( 1 <=…
The sum problem Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 31453 Accepted Submission(s): 9414 Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possib…
Sum Problem Sample code : #include <stdio.h> int main() { int i,n; int sum; while(scanf("%d",&n)!=EOF) { sum=; ;i<=n;i++) sum+=i; printf("%d\n\n",sum); } ; }…
Partial Sum Accepted : 80 Submit : 353 Time Limit : 3000 MS Memory Limit : 65536 KB Partial Sum Bobo has a integer sequence a1,a2,…,an of length n . Each time, he selects two ends 0≤l<r≤n and add |∑rj=l+1aj|−C into a counter which is zero initia…
解体心得: 1.一个回溯法,可以参考八皇后问题. 2.题目要求按照字典序输出,其实在按照回溯法得到的答案是很正常的字典序.不用去特意排序. 3.输出有个坑,就是在输出一串的最后不能有空格,不然要PE,很尴尬. 题目: Problem Description A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the…
Problem Description Given a sequence 1,2,3,--N, your job is to calculate all the possible sub-sequences that the sum of the sub-sequence is M. Input Input contains multiple test cases. each case contains two integers N, M( 1 <= N, M <= 1000000000).i…
这一段时间一直都在刷OJ,这里建一个博客合集,用以记录和分享算法学习的进程. github传送门:https://github.com/haoyuanliu/Online_Judge/tree/master/HangDianOJ Problem Description In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n. Input The input will consist of a series…
Problem Description Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge). In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n. Input The input will consist of a series of integers n, one integer per line. Output For each…
2017江苏省赛的E题,当时在场上看错了题目没做出来,现在补一下…… 题目链接:http://202.197.224.59/OnlineJudge2/index.php/Problem/read/id/1264(注意在上面使用G++编译的话,请使用%I64d) Time Limit : 3000 MS Memory Limit : 65536 KB Bobo has a integer sequence a1,a2,…,an of length n. Each time, he selects…
Problem Description In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n. Input The input will consist of a series of integers n, one integer per line. Output For each case, output SUM(n) in one line, followed by a blank line.…
The maximum subarray problem is the task of finding the contiguous subarray within a one-dimensional array of numbers (containing at least one positive number) which has the largest sum. For example, for the sequence of values −2, 1, −3, 4, −1, 2, 1,…
2018-04-22 19:59:52 Sum系列的问题是Leetcode上的一个很经典的系列题,这里做一个简单的总结. 167. Two Sum II - Input array is sorted 问题描述: 问题求解: 对于已排序的问题,可以使用双指针在O(n)的时间复杂度内完成求解. // 已排序数组,返回indices public int[] twoSum(int[] numbers, int target) { int i = 0; int j = numbers.length -…
代码: 个人浅薄的认为DFS就是回溯法中的一种,一般想到用DFS我们脑中一般都有一颗解法树,然后去按照深度优先搜索去寻找解.而分支界限法则不算是回溯,无论其是采用队列形式的还是优先队列形式的分支界限法. 下面这个函数就是我的DFS的函数,先介绍一下参数的含义,index表示当前要判断是否合适的candidates中的元素的下标,t表示即将要把新数据加入的位置. void backTrace(int sum, int target, int a[], int index, int t, vecto…
Problem Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub-sequences that the sum of the sub-sequence is M. Input Input contains multiple test cases. each case contains two integers N, M( 1 <= N, M <= 1000000…
传送门 Description Given a sequence 1,2,3,......N, your job is to calculate all the possible sub-sequences that the sum of the sub-sequence is M. Input Input contains multiple test cases. each case contains two integers N, M( 1 <= N, M <= 1000000000).i…
