You are given a 0-indexed array nums consisting of positive integers.
There are two types of operations that you can apply on the array any number of times:
\n\nReturn the minimum number of operations required to make the array empty, or -1 if it is not possible.
\n
Example 1:
\n\n\nInput: nums = [2,3,3,2,2,4,2,3,4]\nOutput: 4\nExplanation: We can apply the following operations to make the array empty:\n- Apply the first operation on the elements at indices 0 and 3. The resulting array is nums = [3,3,2,4,2,3,4].\n- Apply the first operation on the elements at indices 2 and 4. The resulting array is nums = [3,3,4,3,4].\n- Apply the second operation on the elements at indices 0, 1, and 3. The resulting array is nums = [4,4].\n- Apply the first operation on the elements at indices 0 and 1. The resulting array is nums = [].\nIt can be shown that we cannot make the array empty in less than 4 operations.\n\n\n
Example 2:
\n\n\nInput: nums = [2,1,2,2,3,3]\nOutput: -1\nExplanation: It is impossible to empty the array.\n\n\n
\n
Constraints:
\n\n2 <= nums.length <= 1051 <= nums[i] <= 106Compiled with clang 11 using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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