g1301_1400.s1306_jump_game_iii

Class Solution

java.lang.Object

g1301_1400.s1306_jump_game_iii.Solution

public class Solution
extends Object

1306 - Jump Game III.

Medium

Given an array of non-negative integers arr, you are initially positioned at start index of the array. When you are at index i, you can jump to i + arr[i] or i - arr[i], check if you can reach to any index with value 0.

Notice that you can not jump outside of the array at any time.

Example 1:

Input: arr = [4,2,3,0,3,1,2], start = 5

Output: true

Explanation:

All possible ways to reach at index 3 with value 0 are:

index 5 -> index 4 -> index 1 -> index 3

index 5 -> index 6 -> index 4 -> index 1 -> index 3

Example 2:

Input: arr = [4,2,3,0,3,1,2], start = 0

Output: true

Explanation:

One possible way to reach at index 3 with value 0 is:

index 0 -> index 4 -> index 1 -> index 3

Example 3:

Input: arr = [3,0,2,1,2], start = 2

Output: false

Explanation: There is no way to reach at index 1 with value 0.

Constraints:

• 1 <= arr.length <= 5 * 104
• 0 <= arr[i] < arr.length
• 0 <= start < arr.length

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	canReach(int[] arr, int start)

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

canReach

public boolean canReach(int[] arr,
                        int start)