［抄题］: 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 on…

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…

详见:https://leetcode.com/problems/island-perimeter/description/ C++: class Solution { public: int islandPerimeter(vector<vector<int>>& grid) { if (grid.empty() || grid[0].empty()) { return 0; } int m = grid.size(), n = grid[0].size(), res =…

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…

Question 463. Island Perimeter Solution 题目大意:给出一个二维数组1表示陆地0表示海,求陆地的周长 思路: 重新构造一张地图grid2即一个二维数组,比原数组大一圈,即长宽都大2 一个点在原地图坐标是(i,j),那么在重新构造的坐标就是(i+1,j+1) 遍历原地图,如果一是陆地,就遍历这个点的周围是否是海,如果是海线周长就加1 Java实现: public int islandPerimeter(int[][] grid) { int total = 0…

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…

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…

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], [0,1,0,0…

题目要求 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…

https://leetcode.com/problems/island-perimeter/ 在一个N×N的矩阵中,N<100,1代表岛,0代表海,岛内没有海,求岛的周长 [[0,1,0,0], [1,1,1,0], [0,1,0,0], [1,1,0,0]] Answer: 16 Explanation: The perimeter is the 16 yellow stripes in the image below: 由正方形组成的不规则图形的周长和正方形个数有什么关系? 这个就是这题的…