Starting in the top left corner of a 2×2 grid, and only being able to move to the right and down, there are exactly 6 routes to the bottom right corner.
How many such routes are there through a given gridSize?
Use Cmd instead of Ctrl if you're on a Mac.
| g | Focus editor |
| Ctrl-Enter | Run the test with current code |
| Ctrl-Shift-K | Reset the editor |
| Ctrl-Shift-L | Clear console output |
| Ctrl-Shift-X | Show the solution |
| [ | Previous challenge |
| ] | Next challenge |
| T | Back to top page |
| ? | Show this dialog |
| ESC | Hide this dialog |
| Shift-ESC | Blur focus from editor |