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Should not the sum be: sum = sum + (a[i][i] - a[i][j]) I have tried to run like you commented but I got wrong answers. The previous sum needs to be taken into account I think before calculating the new one.
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Diagonal Difference
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Should not the sum be: sum = sum + (a[i][i] - a[i][j]) I have tried to run like you commented but I got wrong answers. The previous sum needs to be taken into account I think before calculating the new one.