How to Solve Reach a Number Problem
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Reach a Number
You are standing at position 0 on an infinite number line. There is a destination at position target. You can make some number of moves numMoves so that: On each move, you can either go left or right....
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Understanding the Reach a Number Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are standing at position 0 on an infinite number line. There is a destination at position target. You can make some number of moves numMoves so that: On each move, you can either go left or right. During the ith move (starting from i == 1 to i == numMoves), you take i steps in the chosen direction. Given the integer target, return the minimum number of moves required (i.e., the minimum numMoves) to reach the destination.
Reach a Number
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Examples
target = 23On the 1st move, we step from 0 to 1 (1 step). On the 2nd move, we step from 1 to -1 (2 steps). On the 3rd move, we step from -1 to 2 (3 steps).
target = 32On the 1st move, we step from 0 to 1 (1 step). On the 2nd move, we step from 1 to 3 (2 steps).
Constraints
109 <= target <= 109target != 0How Interview Coder Helps with Leetcode Problems
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Frequently Asked Questions
Common questions about solving Reach a Number and using Interview Coder during coding interviews.
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