This person is just using hard coded solutions to solve problems. You can check his recent solutions and see.
Project Euler: Problem 8, Find largest product in a large string of numbers
First non-zero element in each column
Piecewise linear interpolation
Largest Twin Primes
Rotate Matrix @180 degree
Circular Primes (based on Project Euler, problem 35)
Generate a Parasitic Number
Numbered lottery balls into cells
That's some divisor you've got there...
How many days?!?
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