2576 - Find the Maximum Number of Marked Indices.

Medium

You are given a 0-indexed integer array nums.

Initially, all of the indices are unmarked. You are allowed to make this operation any number of times:

• Pick two different unmarked indices i and j such that 2 * nums[i] <= nums[j], then mark i and j.

Return the maximum possible number of marked indices in nums using the above operation any number of times.

Example 1:

Input: nums = 3,5,2,4

Output: 2

Explanation: In the first operation: pick i = 2 and j = 1, the operation is allowed because 2 \* nums2<= nums1. Then mark index 2 and 1. It can be shown that there's no other valid operation so the answer is 2.

Example 2:

Input: nums = 9,2,5,4

Output: 4

Explanation: In the first operation: pick i = 3 and j = 0, the operation is allowed because 2 \* nums3<= nums0.

Then mark index 3 and 0.

In the second operation: pick i = 1 and j = 2, the operation is allowed because 2 \* nums1<= nums2. Then mark index 1 and 2.

Since there is no other operation, the answer is 4.

Example 3:

Input: nums = 7,6,8

Output: 0

Explanation: There is no valid operation to do, so the answer is 0.

Constraints:

• <code>1 <= nums.length <= 10⁵</code>

• <code>1 <= numsi<= 10⁹</code>