1 class Solution { 2 public: 3 //动态规划,维护两个变量 local[i+1]=max(array[i],local[i]+array[i+1]) 4 int FindGreatestSumOfSubArray(vector<int> array) { 5 int len=array.size(); 6 if(len==0) return 0; 7 if(len==1) return array[0]; 8 int local=array[0]; 9 int g…

考察:最大连续字段和问题. 解决问题时间复杂度:O(n) 问题隐含条件:如果给出的数集都是负数,那么最大连续字段和就是,最大的那个负数. eg:{-2,-1}  结果应该输出 -1 而不是 0 int maxSubArray(int* nums, int numsSize) { int maxSum = 0; //维护最大连续字段和 int currentMaxSum = 0;//当前最大和 int nextNum = 0; int singleSum = nums[0]; //存在全是负数,则…

Maximum Subarray  Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [−2,1,−3,4,−1,2,1,−5,4], the contiguous subarray [4,−1,2,1] has the largest sum = 6. click to show…

1.   Maximum Subarray (#53) Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2, 1, -3, 4, -1, 2, 1, -5, 4], the contiguous subarray [4, -1, 2, 1] has the largest s…

<算法导论>一书中演示分治算法的第二个例子,第一个例子是递归排序,较为简单.寻找maximum subarray稍微复杂点. 题目是这样的:给定序列x = [1, -4, 4, 4, 5, -3, -4, 9, 6 - 4, 6, 4, 3, -5]:寻找一个连续的子序列,使得其和是最大. 这个题目有意义的地方在于,序列X的元素有正有负. 思路很简单,把序列分为相同的两部分A和B,在其内寻找maximum subarray,那么maximum subarray有可能在A中,也有可能在B中,也有…

间隔2天,继续开始写LeetCodeOj. 原题: Maximum Subarray 其实这题很早就看了,也知道怎么做,在<编程珠玑>中有提到,求最大连续子序列,其实只需要O(n)的复杂度就可以. 今天早上到公司比较早,就写了一下,发现还是有地方忘了: 1. 记得记录当前的最大值,因为局部最大和全局最大是不同的. 2. 记得描述32位int最大值,最小值的方法,最大值是 0x7FFFFFFF,最小值是0x80000000. class Solution { public: int maxSub…

Maximum Subarray Sum 题意 给你一个大小为N的数组和另外一个整数M.你的目标是找到每个子数组的和对M取余数的最大值.子数组是指原数组的任意连续元素的子集. 分析 参考 求出前缀和,问题变成了O(n*n)复杂度的问题,但是仍然不能解决问题. 设prefix为前缀和,设i < j,一般都是通过算sum = prefix[j] - prefix[i]求和的最大值,但是本题中有取模,要求sum最大. 第一种情况:如果prefix[j] > prefix[i],sum < pr…

53. Maximum Subarray Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4], the contiguous subarray [4,-1,2,1] has the largest sum = 6. 思路:这个题还挺经典…

53. Maximum Subarray[leetcode] Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4],the contiguous subarray [4,-1,2,1] has the largest sum = 6. 挑…

Find the contiguous subarray within an array (containing at least one number) which has the largest sum. For example, given the array [-2,1,-3,4,-1,2,1,-5,4],the contiguous subarray [4,-1,2,1] has the largest sum = 6. click to show more practice. Mor…