You are given a 0-indexed 2D integer array nums. Initially, your score is 0. Perform the following operations until the matrix becomes empty:
Return the final score.
\n\n
Example 1:
\n\n\nInput: nums = [[7,2,1],[6,4,2],[6,5,3],[3,2,1]]\nOutput: 15\nExplanation: In the first operation, we remove 7, 6, 6, and 3. We then add 7 to our score. Next, we remove 2, 4, 5, and 2. We add 5 to our score. Lastly, we remove 1, 2, 3, and 1. We add 3 to our score. Thus, our final score is 7 + 5 + 3 = 15.\n\n\n
Example 2:
\n\n\nInput: nums = [[1]]\nOutput: 1\nExplanation: We remove 1 and add it to the answer. We return 1.\n\n
\n
Constraints:
\n\n1 <= nums.length <= 3001 <= nums[i].length <= 5000 <= nums[i][j] <= 103Compiled 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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