Race Car
Your car starts at position 0 and speed +1 on an infinite number line.
Your car starts at position 0 and speed +1 on an infinite number line. Your car can go into negative positions. Your car drives automatically according to a sequence of instructions 'A' (accelerate) and 'R' (reverse):
For example, after commands "AAR", your car goes to positions 0 --> 1 --> 3 --> 3, and your speed goes to 1 --> 2 --> 4 --> -1.
Given a target position target, return the length of the shortest sequence of instructions to get there.
Example 1
Input: target = 3
Output: 2
Explanation: The shortest instruction sequence is "AA". Your position goes from 0 --> 1 --> 3.
Example 2
Input: target = 6
Output: 5
Explanation: The shortest instruction sequence is "AAARA". Your position goes from 0 --> 1 --> 3 --> 7 --> 7 --> 6.
Constraints
- 1 <= target <= 10^4
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