Chef and His Habits

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Chef has recently developed a habit of playing with numbers.One such day when he was playing he made a 2-D square matrix of numbers from 1 to N2 (where N is the number of rows and columns) in a sequential manner. He then wanted to know the sum of numbers diagonally to the bottom-right modulo 109+7 starting from any position of that matrix. For example, if N=3 then the matrix would appear as {(1,

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solution.cppC++17

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