classSolution{publiclongmaxMatrixSum(int[][]matrix){long sum=0;int counter=0;int min=Integer.MAX_VALUE;int n=matrix.length;for(int i=0;i<n;i++){for(int j=0;j<matrix[0].length;j++){if(matrix[i][j]<0)counter++;matrix[i][j]=Math.abs(matrix[i][j]);if(matrix[i][j]<min...
We can also keep a record of the sum while building up the prefix sum matrix. The reason this works is if it has a square say 3x3 that meets the requirement, then it would definitely have a square 2x2 meet the requirement. So we can start from 1x1, 2x2 till we reach the max. Pr...
class Solution { public: int maxSubArray(int A[], int n) { if (A == NULL || n < 1) { return INT_MIN; } int contsum = A[0]; int maxsum = A[0]; for (int i=1; i<n; i++) { contsum = max(contsum + A[i], A[i]); maxsum = max(maxsum, contsum); } return...
1#define_for(i,a,b) for(int i = (a);i < (b);i ++)2classSolution3{4public:5intmaxSumTwoNoOverlap(vector<int>& A,intL,intM)6{7vector<int>m1(A.size()),m2(A.size());8m1[0] = m2[0] =0;9_for(i,0,L)10m1[0] +=A[i];11_for(i,0,M)12m2[0] +=A[i];1314_f...
Maximum Sum(子矩阵的最大累加和) TimusOJ - 1146. Maximum Sum(子矩阵的最大累加和) 题目链接 题目 解析 首先,解这道题之前,先要知道求一维的最大子数组和LeetCode53和Hdu1003。 解析: 假设一个2行4列的矩阵如下: 如何求必须含有2行元素的子矩阵的最大累加和? 做法是将两列的元素累加,然后得到累加数组...
If you have figured out the O(n) solution, try coding another solution using the divide and conquer approach, which is more subtle. 题目标签:Array 这道题目给了我们一个array, 让我们找到一个连续的子数组,它的sum是最大的。题目说明有O(n) 方法和 Divide and conquer 方法。
Can you solve this real interview question? Maximum Non Negative Product in a Matrix - You are given a m x n matrix grid. Initially, you are located at the top-left corner (0, 0), and in each step, you can only move right or down in the matrix. Among al
the contiguous subarray[4,−1,2,1]has the largest sum =6. 解题思路: 1classSolution {2public:3intmaxSubArray(vector<int>&nums) {4intmax_sum =INT_MIN;5intsum =0;6for(inti =0; i < nums.size(); ++i) {7sum +=nums[i];8if(sum >max_sum) {9max_sum =sum;10}1112if(sum <...
Leetcode 1031 Maximum Sum of Two Non-Overlapping Subarrays (两个不重叠子数组的最大和) (滑动窗口) Leetcode 1031题目描述Given an array A of non-negative integers, return the maximum sum of elements in two non-overlapping (contiguous) subarrays, which have lengths L and M. (For clarification...
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