463. 岛屿的周长 给定一个包含 0 和 1 的二维网格地图,其中 1 表示陆地 0 表示水域. 网格中的格子水平和垂直方向相连(对角线方向不相连).整个网格被水完全包围,但其中恰好有一个岛屿(或者说,一个或多个表示陆地的格子相连组成的岛屿). 岛屿中没有"湖"("湖" 指水域在岛屿内部且不和岛屿周围的水相连).格子是边长为 1 的正方形.网格为长方形,且宽度和高度均不超过 100 .计算这个岛屿的周长. 示例 : 输入: [[0,1,0,0], [1,1,1,0…

给定一个包含 0 和 1 的二维网格地图,其中 1 表示陆地 0 表示水域. 网格中的格子水平和垂直方向相连(对角线方向不相连).整个网格被水完全包围,但其中恰好有一个岛屿(或者说,一个或多个表示陆地的格子相连组成的岛屿). 岛屿中没有"湖"("湖" 指水域在岛屿内部且不和岛屿周围的水相连).格子是边长为 1 的正方形.网格为长方形,且宽度和高度均不超过 100 .计算这个岛屿的周长. java版 class Solution { public int island…

695. 岛屿的最大面积 给定一个包含了一些 0 和 1 的非空二维数组 grid . 一个 岛屿 是由一些相邻的 1 (代表土地) 构成的组合,这里的「相邻」要求两个 1 必须在水平或者竖直方向上相邻.你可以假设 grid 的四个边缘都被 0(代表水)包围着. 找到给定的二维数组中最大的岛屿面积.(如果没有岛屿,则返回面积为 0 .) 示例 1: [[0,0,1,0,0,0,0,1,0,0,0,0,0], [0,0,0,0,0,0,0,1,1,1,0,0,0], [0,1,1,0,1,0,0,…

200. 岛屿数量 给定一个由 '1'(陆地)和 '0'(水)组成的的二维网格,计算岛屿的数量.一个岛被水包围,并且它是通过水平方向或垂直方向上相邻的陆地连接而成的.你可以假设网格的四个边均被水包围. 示例 1: 输入: 11110 11010 11000 00000 输出: 1 示例 2: 输入: 11000 11000 00100 00011 输出: 3 PS: 循环得时候把1变成2,防止重复计算一个岛,并且提高效率 class Solution { public int numIsland…

题目: You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely surrounded by water, and there is exactly one…

You are given a map in form of a two-dimensional integer grid where 1 represents land and 0 represents water. Grid cells are connected horizontally/vertically (not diagonally). The grid is completely surrounded by water, and there is exactly one isla…

Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be a unique set of numbers. Ensure that numbers within the set are sorted in ascending order. Example 1…

Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation. For example: Given "aacecaaa", return "aaacecaaa&qu…

Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same le…

Design a data structure that supports the following two operations: void addWord(word)bool search(word) search(word) can search a literal word or a regular expression string containing only letters a-z or .. A . means it can represent any one letter.…