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advent-of-code/2015/ruby/day_25.rb

16 lines
220 B

row = 2981
col = 3075
i = row*(row-1)/2 + 1
i += (row..row+col-1).inject(:+) - row
value = 20151125
(i-1).times do
value *= 252533
value %= 33554393
end
puts value
__END__
Enter the code at row 2981, column 3075.