数组·matrix 模式

螺旋矩阵

Given an m x n matrix, return all elements in spiral order starting from the top-left corner.

螺旋矩阵 II

Generate a spiral matrix of size n x n, filled with elements from 1 to n² in spiral order, for interview-focused solving…

生命游戏

Solve the Game of Life by updating each cell based on its eight neighbors using Array and Matrix simulation patterns eff…

对角线遍历

Traverse a matrix diagonally and return all elements in the specific zig-zag order required by the problem pattern.

重塑矩阵

Reshape the Matrix involves transforming a 2D matrix into a new matrix with the same elements in row-major order, follow…

图片平滑器

Apply a 3x3 smoothing filter to a matrix, rounding down each cell average including surrounding neighbors for accurate r…

托普利茨矩阵

Determine if a given matrix is a Toeplitz matrix by checking diagonal consistency.

有效的井字游戏

Verify if a given Tic-Tac-Toe board can represent a valid game state during a valid sequence of moves.

图像重叠

Image Overlap requires calculating the overlap between two binary matrices by translating one image over the other.

转置矩阵

Transpose Matrix problem requires flipping a matrix's rows and columns to return the transposed version.

螺旋矩阵 III

Solve the Spiral Matrix III problem by simulating the movement across a matrix with specific constraints on direction an…

可以被一步捕获的棋子数

This problem involves finding the number of pawns a rook can capture on a chessboard, considering obstacles like bishops…

可以攻击国王的皇后

Identify all black queens on an 8x8 chessboard that can attack the white king using array and matrix simulation techniqu…

二维网格迁移

Shift 2D Grid requires shifting elements of a matrix by a given number of times, simulating step-by-step movement.

矩阵区域和

Compute a matrix where each cell contains the sum of all elements within k-distance blocks using prefix sums efficiently…

矩阵中的幸运数

The Lucky Numbers in a Matrix problem involves finding elements that are the minimum in their row and maximum in their c…

矩阵对角线元素的和

Calculate the sum of both primary and secondary diagonals in a square matrix while avoiding double-counting overlaps.

二进制矩阵中的特殊位置

Identify all special positions in a binary matrix where a 1 has no other 1s in its row or column, ensuring optimal array…

最富有客户的资产总量

Calculate the richest customer's wealth by summing the amounts in each customer's bank accounts in a matrix.

球会落何处

Determine where each ball exits a diagonal board grid or if it gets stuck, using matrix simulation with careful traversa…

判断矩阵经轮转后是否一致

Determine if a binary matrix can be transformed into another by rotating it 90 degrees multiple times.

最大的幻方

Find the side length of the largest magic square in a matrix where row, column, and diagonal sums are equal.

循环轮转矩阵

This problem requires cyclically rotating a grid by rotating each layer of the matrix counter-clockwise for a specified …

检查操作是否合法

Determine if a move on an 8x8 board is legal by validating lines in all directions using array and matrix patterns.

网格游戏

Solve the Grid Game problem by optimizing the movement of two robots on a 2D matrix grid.

判断单词是否能放入填字游戏内

Determine if a word fits in a crossword grid using array and matrix checks, accounting for spaces, letters, and blocked …

将一维数组转变成二维数组

Convert a 1D integer array into a structured 2D array with specified rows and columns using all elements sequentially.

转角路径的乘积中最多能有几个尾随零

Find the maximum trailing zeros in the product of a cornered path within a 2D grid.

统计网格图中没有被保卫的格子数

Solve Count Unguarded Cells in the Grid by marking guard sight lines across a blocked matrix and counting untouched empt…

判断矩阵是否是一个 X 矩阵

Check if a square matrix follows the X-Matrix pattern by validating diagonal and non-diagonal conditions.

矩阵中的局部最大值

Find the largest value in every 3x3 submatrix of an n x n integer matrix efficiently using nested loops.

沙漏的最大总和

Calculate the maximum sum of an hourglass in a 2D matrix using array traversal and submatrix evaluation techniques effic…

行和列中一和零的差值

This problem requires computing a difference matrix based on the ones and zeros in each row and column of a binary matri…

子矩阵元素加 1

Increment Submatrices by One focuses on efficiently updating submatrices using row-wise prefix sums in an n by n matrix.

查询网格图中每一列的宽度

This problem asks you to compute the width of each column in a grid, where the width is defined by the length of the lar…

一最多的行

Find the row with the maximum ones in a binary matrix and return its index and count.

构造乘积矩阵

Solve the "Construct Product Matrix" problem by calculating the product of elements in 2D matrices without division.

找到冠军 I

Find Champion I is an easy problem focusing on identifying the strongest team in a tournament using matrix-based compari…

找出网格的区域平均强度

Find the Grid of Region Average requires identifying regions in a matrix where pixel differences are below a threshold, …

修改矩阵

Modify the Matrix efficiently by replacing all -1 elements with the maximum in their column using array and matrix opera…

元素和小于等于 k 的子矩阵的数目

Count all submatrices including the top-left element with sum less than k using array and matrix prefix sum strategies.

构造相同颜色的正方形

Determine if a 3x3 grid can form a 2x2 square of the same color by changing at most one cell efficiently.

判断矩阵是否满足条件

Check if a grid satisfies given conditions by analyzing array and matrix structure with specific checks on values.

包含所有 1 的最小矩形面积 I

Find the smallest rectangle to cover all 1's in a 2D binary matrix, focusing on array and matrix handling.

包含所有 1 的最小矩形面积 II

Find the minimum area to cover all 1's in a 2D binary grid using three non-overlapping rectangles.

统计 X 和 Y 频数相等的子矩阵数量

Count the number of submatrices with equal frequency of 'X' and 'Y' in a 2D character grid.

跳过交替单元格的之字形遍历

Traverse a 2D grid in a zigzag pattern while skipping alternate cells, focusing on array and matrix manipulation challen…

等和矩阵分割 I

Determine if an m x n matrix grid can be split into two non-empty sections with equal sums by making a single horizontal…