Problem 2173. How many rectangles in a grid ?
How many rectangles are there in an m × n grid ?
For example, if m=1 & n=2, we have 3 rectangles.
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1 Comment
Georges
on 21 Jul 2014
Good one :)
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Combinatorics II
- 15 Problems
- 23 Finishers
- Path of least resistance
- Path of least resistance - Move all direction
- Number of paths on a grid
- Number of paths on a 3d grid
- Number of paths on a n-dimensional grid
- Which way to go?
- How many rectangles in a grid ?
- The Number of Ways
- possible ways through matrix
- Yet Another Path Finder
- Find the path through the cell
- Project Euler: Problem 18, Maximum path sum I
- Break it up! Break it up!
- Number of cyles and fixed points in a permutation
- Generate binary combinations for a given number of bit(s)
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