All contents and pictures on this website come from the Internet and are updated regularly every week. They are for personal study and research only, and should not be used for commercial purposes. Thank you for your cooperation.
Given a picture consisting of black and white pixels, find the number of black lonely
pixels.
The picture is represented by a 2D char array consisting of 'B' and 'W', which means black
and white pixels respectively.
A black lonely pixel is character 'B' that located at a specific position where the same row
and same column don't have any other black pixels.
Example:
Input:
[['W', 'W', 'B'],
['W', 'B', 'W'],
['B', 'W', 'W']]
Output: 3
Explanation: All the three 'B's are black lonely pixels.
Note:
- The range of width and height of the input 2D array is [1,500].
Difficulty:
Medium
Lock:
Prime
All contents and pictures on this website come from the Internet and are updated regularly every week. They are for personal study and research only, and should not be used for commercial purposes. Thank you for your cooperation.