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:
Given the integer target, return the minimum number of moves required (i.e., the minimum numMoves) to reach the destination.
Examples
Example 1
Input: target = 2
Output: 3
Explanation:
On 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).
Example 2
Input: target = 3
Output: 2
Explanation:
On 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 <= 109
target != 0
754. Reach a Number
Medium
30 Points
Math
Binary Search
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:
Given the integer target, return the minimum number of moves required (i.e., the minimum numMoves) to reach the destination.
Examples
Example 1
Input: target = 2
Output: 3
Explanation:
On 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).
Example 2
Input: target = 3
Output: 2
Explanation:
On the 1st move, we step from 0 to 1 (1 step).
On the 2nd move, we step from 1 to 3 (2 steps).