Copying code
Problem
Y has n lines of code and want to move the nth line of code to the ith line of code.
Y can use two methods for this work:
- First, Y can press Ctr + x (two keys) and cut the nth line of code, then move the cursor to the ith line pressing up key n−i times and then paste the nth line using Ctr + v (two keys).
- Second, Y can press Ctr + up (two keys) n−i times.
What is the minimum number of keys that Y has to press?
Input
The only line of input is n and i separated by space.
1≤i≤n≤109
Output
A single line, the minimum number of keys that Y has to press to do the job.
Time Limit: 1
Memory Limit: 256
Source Limit:
Explanation
Y can do both methods and press 8 keys.
- Press Ctr + x and then press up 4 times and at the end press Ctr + v (two times Ctr, one time x, v and 4 time up that sums up to 8).
- Press Ctr + up 4 times (both Ctr and up pressed 4 times that sums up to 8).
