Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…
Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one for…
原题链接在这里:https://leetcode.com/problems/range-addition-ii/description/ 题目: Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two …
Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…
Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one for…
Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…
题目: Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one…
［抄题］: Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by o…
problem 598. Range Addition II 题意: 第一感觉就是最小的行和列的乘积即是最后结果. class Solution { public: int maxCount(int m, int n, vector<vector<int>>& ops) { for(auto op : ops) { m = min(m, op[]); n = min(n, op[]); } return m*n; } }; 参考 1. Leetcode_easy_598.…
Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one for…
作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 题目地址:https://leetcode.com/problems/range-addition-ii/description/ 题目描述 Given an m * n matrix M initialized with all 0's and several update operations. Operations are represe…
Assume you have an array of length n initialized with all 0's and are given k update operations. Each operation is represented as a triplet: [startIndex, endIndex, inc] which increments each element of subarray A[startIndex ... endIndex] (startIndex…
这是悦乐书的第271次更新,第285篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第138题(顺位题号是598).给定一个m行n列的新二维数组M,其初始值为0.提供一个二维数组ops,每次对M做如下操作,每次从ops中取出一个数组temp,temp里面包含两个整数a和b,使得M[i][j]的元素都自增1,其中0 <= i < a, 0 <= j < b.在遍历完ops中的所有数组后,找出M中值最大的元素的个数.例如: 输入: m = 3, n = 3,…
Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one for…
问题 该文章的最新版本已迁移至个人博客[比特飞],单击链接 https://www.byteflying.com/archives/3881 访问. 给定一个初始元素全部为 0,大小为 m*n 的矩阵 M 以及在 M 上的一系列更新操作. 操作用二维数组表示,其中的每个操作用一个含有两个正整数 a 和 b 的数组表示,含义是将所有符合 0 <= i < a 以及 0 <= j < b 的元素 M[i][j] 的值都增加 1. 在执行给定的一系列操作后,你需要返回矩阵中含有最大整数的…
做个基本思路可以用 brute force, 但时间复杂度较高. 因为起始值都为0, 所以肯定是左上角的重合的最小的长方形就是结果, 所以我们求x, y 的最小值, 最后返回x*y. Code T: O(m*n) S: O(1) class Solution: def rangeAddition2(self, m, n, ops): for op1, op2 in ops: m = min(m, op1) n = min(n, op2) return m*n…
You are given an m x n matrix M initialized with all 0's and an array of operations ops, where ops[i] = [ai, bi] means M[x][y] should be incremented by one for all 0 <= x < ai and 0 <= y < bi. Count and return the number of maximum integers in…
作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 只修改区间起终点 日期 题目地址:https://leetcode-cn.com/problems/range-addition/ 题目描述 Assume you have an array of length n initialized with all 0's and are given k update operations. Each oper…
Given a string representing an expression of fraction addition and subtraction, you need to return the calculation result in string format. The final result should be irreducible fraction. If your final result is an integer, say 2, you need to change…
Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, co…
Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. The update(i, val) function modifies nums by updating the element at index i to val. Example: Given nums = [1, 3, 5] sumRange(0, 2) -> 9 update(1, 2…
Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). The above rectangle (with the red border) is defined by (row1, col1) = (2, 1) and (row2, co…
Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Given nums = [-2, 0, 3, -5, 2, -1] sumRange(0, 2) -> 1 sumRange(2, 5) -> -1 sumRange(0, 5) -> -3 Note: You may assume that the array do…
原题链接在这里:https://leetcode.com/problems/range-sum-query-2d-mutable/ 题目: Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). The above rectangle (…
Given a 2D matrix matrix, find the sum of the elements inside the rectangle defined by its upper left corner (row1, col1) and lower right corner (row2, col2). Range Sum Query 2D The above rectangle (with the red border) is defined by (row1, col1) = (…
A Range Module is a module that tracks ranges of numbers. Your task is to design and implement the following interfaces in an efficient manner. addRange(int left, int right) Adds the half-open interval [left, right), tracking every real number in tha…
Given an m * n matrix M initialized with all 0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with two positive integers a and b, which means M[i][j] should be added by one for…
Range Sum Query - Immutable Given an integer array nums, find the sum of the elements between indices i and j (i ≤ j), inclusive. Example: Given nums = [-2, 0, 3, -5, 2, -1] sumRange(0, 2) -> 1 sumRange(2, 5) -> -1 sumRange(0, 5) -> -3 Note: You…
Very similar to Range Sum Query - Immutable, but we now need to compute a 2d accunulated-sum. In fact, if you work in computer vision, you may know a name for such an array --- Integral Image. To solve this problem, Stefan has already posted a very e…
Given an m * n matrixMinitialized with all0's and several update operations. Operations are represented by a 2D array, and each operation is represented by an array with twopositiveintegersaandb, which meansM[i][j]should beadded by onefor all0 <= i <…
