@Doddy, This can be solved by a trivial solution something like -
a=0,b=0,c=1,d=1. The test suite will accept the solution, however, this is not something you want (only using non-zero integers as mentioned in the problem statement).
I have edited the test suite accordingly, and will do so wherever I face the same issue in the Number puzzle series.
Back to basics 15 - classes
How to subtract?
03 - Matrix Variables 3
Find my daddy long leg (No 's')
Make roundn function
Number Puzzle - 074
Number Puzzle - 064
Number Puzzle - 103
Number Puzzle - 056
Matrix Pattern 1
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