Need a test case with a 0 on the chosen diagonal.
Agree with Jon's comment that the matrix should contain 0 elements
so simple that it never occurred to me
The Goldbach Conjecture, Part 2
Project Euler: Problem 6, Natural numbers, squares and sums.
Sum of diagonal of a square matrix
03 - Matrix Variables 1
Magic is simple (for beginners)
Sum of big primes without primes
Recycled Numbers (CodeJam Qualification Round 2012)
Divisors for big integer
Find the path through the cell
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