Package g2501_2600.s2543_check_if_point_is_reachable

Class Solution

java.lang.Object

g2501_2600.s2543_check_if_point_is_reachable.Solution

public class Solution
extends Object

2543 - Check if Point Is Reachable.

Hard

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

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
boolean	isReachable(int x, int y)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

isReachable

public boolean isReachable(int x,
                           int y)