Jumping Rabbit
Problem
At time 0, a rabbit is standing at coordinate 0 on X-axis. During the ith second he can either stay at his position, or can jump i distance to the left or right.
He wants to reach at coordinate D. Find the minimum possible time to reach the destination.
Constraints
1 ≤ D ≤ 109
Input
Integer D
Output
Print the minimum possible time to reach the destination.
Time Limit: 1
Memory Limit: 256
Source Limit:
Explanation
During 1st second:- Stay
During 2nd second:- Jump to the right
