I'm working on a programming challenge where I'm given a 9-digit string that represents a 3x3 numeric keypad layout. Additionally, I have a target sequence of numbers that I need to enter. The challenge is to determine the least amount of time required for me to punch in this sequence. Each move to an adjacent number, whether it's left, right, up, down, or diagonally, takes 1 second. I start the timer as soon as I hit the first number. I need help figuring out the correct approach to solve this, especially if you can provide insights using JavaScript. Also, how difficult do you think this challenge is? I have 40 minutes to complete it.
2 Answers
Are you required to enter the sequence of numbers in the exact order given, or can you rearrange them for efficiency? If you must maintain the order, the key challenge is to find the quickest route between each number on the grid, which I think isn't too complex. Just make sure to account for the different paths.
Can you clarify if you posted the problem link or the constraints? I’m a bit confused because it seems straightforward to calculate the distance given that you only have 9 cells. If there is a larger grid or any other constraints, such as obstacles, it might turn into a more complex pathfinding task.
I couldn't locate the exact problem on Hackerrank, but yes, it's a 3x3 grid with only 9 cells. And the numbers in the grid aren't in any specific order. For instance, '715293548' looks like this: 7 1 5, 2 9 3, 5 4 8.
That layout makes sense! So you’re just calculating the distance based on the arrangement. Should be manageable!