- Difficulty: Medium
- Tags: LeetCode, Medium, Greedy, Array, Math, Binary Search, Number Theory, leetcode-2601, O(p + nlogp), O(p)
Problem
You are given a 0-indexed integer array nums
of length n
.
You can perform the following operation as many times as you want:
- Pick an index
i
that you haven’t picked before, and pick a primep
strictly less thannums[i]
, then subtractp
fromnums[i]
.
Return true if you can make nums
a strictly increasing array using the above operation and false otherwise.
A strictly increasing array is an array whose each element is strictly greater than its preceding element.
Example 1:
Input: nums = [4,9,6,10] Output: true Explanation: In the first operation: Pick i = 0 and p = 3, and then subtract 3 from nums[0], so that nums becomes [1,9,6,10]. In the second operation: i = 1, p = 7, subtract 7 from nums[1], so nums becomes equal to [1,2,6,10]. After the second operation, nums is sorted in strictly increasing order, so the answer is true.
Example 2:
Input: nums = [6,8,11,12] Output: true Explanation: Initially nums is sorted in strictly increasing order, so we don't need to make any operations.
Example 3:
Input: nums = [5,8,3] Output: false Explanation: It can be proven that there is no way to perform operations to make nums sorted in strictly increasing order, so the answer is false.
Constraints:
1 <= nums.length <= 1000
1 <= nums[i] <= 1000
nums.length == n