解法三:分治算法 Divide and Conquer 读题 这个题有点意思啊,可以用上三种不同的经典算法。 此题可以由之前的买卖股票问题(王几行xing:【Python-转码刷题】LeetCode 121E 买卖股票的最佳时机 Buy n Sell Stock 的三种解法),转化过来: 先求出每天相对前一天的价格收益,转换成一个 n-1的数列; 所谓的某天买入...
1publicclassSolution2{3publicintmaxSubArray(int[] nums)4{5//Solution 3: Divide and Conquer. O(nlogn)6if(nums ==null|| nums.length == 0)7return0;8910returnMax_Subarray_Sum(nums, 0, nums.length-1);11}1213publicintMax_Subarray_Sum(int[] nums,intleft,intright)14{15if(left == right...
然后是分治法Divide and Conquer,考虑数组中点和最优子序列下标(i,j), 只有三种情况: 跨过中点 中点左边 中点右边 其时间复杂度是 O(nlog2n) class Solution { public: int maxSubArray(vector<int>& nums) { if (nums.empty()) return 0; return helper(nums, 0, (int)nums.size() - 1); ...
Code 1classSolution {2public:3intmaxSubArray(vector<int>&nums) {4intmax = nums[0], sum =0;5for(inti =0; i < nums.size(); i++) {6sum +=nums[i];7if(sum > max) max =sum;8if(sum <0) sum =0;9}10returnmax;11}12};...
Explanation: [4,-1,2,1] has the largest sum = 6. Follow up: If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle. 题目大意 给定一个整数数组 nums ,找到一个具有最大和的连续子数组(子数组最少包含一个元素),...
Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum.
the contiguous subarray [4,−1,2,1] has the largest sum = 6. More practice: If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle. Hide Tags Divide and Conquer Array Dynamic Programming ...
Day2-2 leetcode 53. Maximum Subarray Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. Follow up: If you have figured out the O(n) solution, try coding another solution using the divide and conquer ...
,the contiguous subarray [4,-1,2,1] has the largest sum = 6 More practice:If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle.分析题目要求O(n)的算法,然而dp对我来说就是老大难,想了半天的我看到题目属于Easy的...
the contiguous subarray[4,-1,2,1]has the largest sum =6. click to show more practice. More practice: If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle. ...