🚀

End of Year Sale: Use Coupon Code END2025 to Get Extra 25% Off.

08DAYS
:
11HOURS
:
40MINUTES
:
54SECONDS

Leetcode Problem 750. Number Of Corner Rectangles

750. Number Of Corner Rectangles

Leetcode Solutions

Count Corners Approach

  1. Initialize a 2D array count with dimensions equal to the number of columns in the grid, initialized to 0.
  2. Initialize a variable total to 0 to keep track of the total number of rectangles.
  3. Iterate through each row of the grid. a. For each pair of '1's in the current row (at positions i and j), do the following: i. Add count[i][j] to total because each previous occurrence of this pair means a new rectangle can be formed. ii. Increment count[i][j] to indicate that we have found another occurrence of this pair.
  4. Return the value of total.
UML Thumbnail

Brute Force Approach

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...