learns -m flag to select minimum multiplier
Better selection of multiplier numbers
The first is always small.
The second is always close to the requested maximum,
unless the requested maximum has already appeared.
The possible multipliers increase over the four segments.
Draft of program finished
Separate operation list generator from operation list vetting
Just regenerate until we get an acceptable one
Then convert operation list to strings and insert into SVG as before
utility functions for adder constants; also -z flag
select multiplier values for four runs
Start big rework of mathpuzzle.pl to generate random puzzles
Remove canned values; correct run patterns
Add command-line flags to control difficulty
Document and extend random number generators
start working on actual puzzle generation