Package 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.<p>Hard</p> <p><img src="https://assets.leetcode.com/uploads/2020/07/09/change.png" alt="" /></p> <p>Winston was given the above mysterious function <code>func</code>. He has an integer array <code>arr</code> and an integer <code>target</code> and he wants to find the values <code>l</code> and <code>r</code> that make the value <code>|func(arr, l, r) - target|</code> minimum possible.</p> <p>Return <em>the minimum possible value</em> of <code>|func(arr, l, r) - target|</code>.</p> <p>Notice that <code>func</code> should be called with the values <code>l</code> and <code>r</code> where <code>0 <= l, r < arr.length</code>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> arr = [9,12,3,7,15], target = 5</p> <p><strong>Output:</strong> 2</p> <p><strong>Explanation:</strong> 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.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> arr = [1000000,1000000,1000000], target = 1</p> <p><strong>Output:</strong> 999999</p> <p><strong>Explanation:</strong> Winston called the func with all possible values of [l,r] and he always got 1000000, thus the min difference is 999999.</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> arr = [1,2,4,8,16], target = 0</p> <p><strong>Output:</strong> 0</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= arr.length <= 10⁵</code></li> <li><code>1 <= arr[i] <= 10⁶</code></li> <li><code>0 <= target <= 10⁷</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	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 Details

Solution

public Solution()

Method Details

closestToTarget

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