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1354. Construct Target Array With Multiple Sums

Given an array of integers target. From a starting array, A consisting of all 1's, you may perform the following procedure :

  • let x be the sum of all elements currently in your array.
  • choose index i, such that 0 <= i < target.size and set the value of A at index i to x.
  • You may repeat this procedure as many times as needed.

Return True if it is possible to construct the target array from A otherwise return False.

 

Example 1:

Input: target = [9,3,5]
Output: true
Explanation: Start with [1, 1, 1] 
[1, 1, 1], sum = 3 choose index 1
[1, 3, 1], sum = 5 choose index 2
[1, 3, 5], sum = 9 choose index 0
[9, 3, 5] Done

Example 2:

Input: target = [1,1,1,2]
Output: false
Explanation: Impossible to create target array from [1,1,1,1].

Example 3:

Input: target = [8,5]
Output: true

 

Constraints:

  • N == target.length
  • 1 <= target.length <= 5 * 10^4
  • 1 <= target[i] <= 10^9

Difficulty:

Hard

Lock:

Normal

Company:

Quora

Solution(Chinese):

LEETCODE 1354. Construct Target Array With Multiple Sums 解题思路分析