2543. Check if Point Is Reachable
Description
There exists an infinitely large grid. You are currently at point (1, 1)
, and you need to reach the point (targetX, targetY)
using a finite number of steps.
In one step, you can move from point (x, y)
to any one of the following points:
(x, y - x)
(x - y, y)
(2 * x, y)
(x, 2 * y)
Given two integers targetX
and targetY
representing the X-coordinate and Y-coordinate of your final position, return true
if you can reach the point from (1, 1)
using some number of steps, and false
otherwise.
Example 1:
Input: targetX = 6, targetY = 9 Output: false Explanation: It is impossible to reach (6,9) from (1,1) using any sequence of moves, so false is returned.
Example 2:
Input: targetX = 4, targetY = 7 Output: true Explanation: You can follow the path (1,1) -> (1,2) -> (1,4) -> (1,8) -> (1,7) -> (2,7) -> (4,7).
Constraints:
1 <= targetX, targetY <= 109