Sum of Tri-diagonal Matrix

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Write a code for Sum of Tri-diagonal Matrix and print both the sum and Tri-diagonal Matrix , take input of valid number which does not come in 0th place, and the matrix should be a square matrix. For better understanding take matrix size greater than [5][5] . Example :- 1) Tri-diagonal Matrix ``` 1 2 0 0 0 3 4 5 0 0 0 6 7

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solution.cppC++17

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