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View Compilation Error

0_0_6338635_6598.cpp: In function `Mat sum(Mat&, int)':
0_0_6338635_6598.cpp:53: error: no match for 'operator*' in 'sum(((Mat&)(+A)), (k / 2)) * operator+(operator^(((Mat&)(+A)), (k / 2)), E)'
0_0_6338635_6598.cpp:17: note: candidates are: Mat operator*(Mat&, Mat&)


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