g1501_1600.s1521_find_a_value_of_a_mysterious_function_closest_to_target

Class Solution

java.lang.Object

g1501_1600.s1521_find_a_value_of_a_mysterious_function_closest_to_target.Solution

public class Solution
extends Object

1521 - Find a Value of a Mysterious Function Closest to Target.

Hard

Winston was given the above mysterious function func. He has an integer array arr and an integer target and he wants to find the values l and r that make the value |func(arr, l, r) - target| minimum possible.

Return the minimum possible value of |func(arr, l, r) - target|.

Notice that func should be called with the values l and r where 0 <= l, r < arr.length.

Example 1:

Input: arr = [9,12,3,7,15], target = 5

Output: 2

Explanation: Calling func with all the pairs of [l,r] = [[0,0],[1,1],[2,2],[3,3],[4,4],[0,1],[1,2],[2,3],[3,4],[0,2],[1,3],[2,4],[0,3],[1,4],[0,4]], Winston got the following results [9,12,3,7,15,8,0,3,7,0,0,3,0,0,0]. The value closest to 5 is 7 and 3, thus the minimum difference is 2.

Example 2:

Input: arr = [1000000,1000000,1000000], target = 1

Output: 999999

Explanation: Winston called the func with all possible values of [l,r] and he always got 1000000, thus the min difference is 999999.

Example 3:

Input: arr = [1,2,4,8,16], target = 0

Output: 0

Constraints:

• 1 <= arr.length <= 105
• 1 <= arr[i] <= 106
• 0 <= target <= 107

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	closestToTarget(int[] arr, int target)

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

closestToTarget

public int closestToTarget(int[] arr,
                           int target)