#2146. 矩阵左下角和右上角元素的和 C++ 11级

矩阵左下角和右上角元素的和 C++ 11级

Samples

4 5
7 1 9 9 8
8 2 6 2 1
6 1 6 8 2
3 6 2 5 4

11

Limitation

1s, 1024KiB for each test case.

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