sum_digonal

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Aalok is a local boy of chandani chowk. and he is very intelligent as well. his friend given a question of maths that he has to find sum of diagonal of matrix. let help him to find out it. $ note: $ matrix is square matrix. ###Input: - First line will contain $T$ , number of testcases. - Each testcase contains Two line . - First line will contain integer $N$ . - next line co

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solution.cppC++17

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