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Problem 1529. Sum the numbers on the main diagonal

Created by Tomasz Jakub

Sum the numbers on the main diagonal of an n-by-n matrix. For input:

      A = [1 2 4
           3 6 2
           2 4 7]

The output value should equal 14.

Problem Group

Solution Statistics

139 correct solutions 20 incorrect solutions
Last solution submitted on Dec 14, 2014