File: root - text - article - 2019 - 12 - find-the-number-of-islands.txt.txt
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Category: Computing | 209 Views, 16931 Search Bots | 125 Words
| Browse | Archive
![Subscribe to Feed Burner Subscribe to Feed Burner](/images/form/rss.gif)
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Category: Computing | 209 Views, 16931 Search Bots | 125 Words
![Subscribe to Feed Burner Subscribe to Feed Burner](/images/form/rss.gif)
Hi, here's your problem today. This problem was recently asked by LinkedIn:
Given a 2-dimensional grid consisting of 1's (land blocks) and 0's (water blocks), count the number of islands present in the grid. The definition of an island is as follows:
1.) Must be surrounded by water blocks.
2.) Consists of land blocks (1's) connected to adjacent land blocks (either vertically or horizontally).
Assume all edges outside of the grid are water.
Example:
Input:
Output: 3
Here's your starting point:
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Cateogry: Computing | 209 Views, 16931 Search Bots | 125 Words Given a 2-dimensional grid consisting of 1's (land blocks) and 0's (water blocks), count the number of islands present in the grid. The definition of an island is as follows:
1.) Must be surrounded by water blocks.
2.) Consists of land blocks (1's) connected to adjacent land blocks (either vertically or horizontally).
Assume all edges outside of the grid are water.
Example:
Input:
10001
11000
10110
00000
Output: 3
Here's your starting point:
class Solution(object):
def inRange(self, grid, r, c):
numRow, numCol = len(grid), len(grid[0])
if r < 0 or c < 0 or r >= numRow or c >= numCol:
return False
return True
def numIslands(self, grid):
# Fill this in.
grid = [[1, 1, 0, 0, 0],
[0, 1, 0, 0, 1],
[1, 0, 0, 1, 1],
[0, 0, 0, 0, 0]]
print(Solution().numIslands(grid))
# 3
![Subscribe to Feed Burner Subscribe to Feed Burner](/images/form/rss.gif)
Related Articles
- Daily Interview Question: Find Cycles in a Graph
- Algorithm Interview: Longest Consecutive Sequence
- Non-decreasing Array with Single Modification
- Find Pythagorean Triplets
- Skip the readings, focus on problems. And use all the hints!
- PHP Unit Tests on VPS Server
- Multitasking
- Daily Interview Problem: Decode String
- Daily Interview Problem: Maximum Profit From Stocks
- Daily Interview Problem: Count Number of Unival Subtrees
©2006~2024 SteakOverCooked - 0.01022 Seconds(s) - 1861.038 KB/s - 36 Online
Memory: 493.61 KB
18:54:01 up 13 days, 18:33, 2 users, load average: 0.98, 0.86, 0.73 - Server PHP Version: 7.4.33
How to Cook a Perfect Steak? | <meta name="robots" content="noindex, follow" />
![](/images/top.jpg)
18:54:01 up 13 days, 18:33, 2 users, load average: 0.98, 0.86, 0.73 - Server PHP Version: 7.4.33
Read & Write - Normal - Mini - Post - All Comments - Statistics
Be the first one to comment this page !