You are given an m x n matrix grid consisting of positive integers.
Perform the following operation until grid becomes empty:
Note that the number of columns decreases by one after each operation.
\n\nReturn the answer after performing the operations described above.
\n\n\n
Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2022/10/19/q1ex1.jpg\")
\n\nInput: grid = [[1,2,4],[3,3,1]]\nOutput: 8\nExplanation: The diagram above shows the removed values in each step.\n- In the first operation, we remove 4 from the first row and 3 from the second row (notice that, there are two cells with value 3 and we can remove any of them). We add 4 to the answer.\n- In the second operation, we remove 2 from the first row and 3 from the second row. We add 3 to the answer.\n- In the third operation, we remove 1 from the first row and 1 from the second row. We add 1 to the answer.\nThe final answer = 4 + 3 + 1 = 8.\n\n\n
Example 2:
\n![\"\"](\"https://assets.leetcode.com/uploads/2022/10/19/q1ex2.jpg\")
\n\nInput: grid = [[10]]\nOutput: 10\nExplanation: The diagram above shows the removed values in each step.\n- In the first operation, we remove 10 from the first row. We add 10 to the answer.\nThe final answer = 10.\n\n\n
\n
Constraints:
\n\nm == grid.lengthn == grid[i].length1 <= m, n <= 501 <= grid[i][j] <= 100Compiled 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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