Simulates how many pipes it would take to get a set number of rare drops from a rare enemy by doing the piping strategy.
The first graph (histogram) tells what percentage of trials ended up requiring that number. The second graph shows the cumulative distribution function (CDF), which shows what fraction of trials that required fewer than a given number of waves.
For example, find the x-value for the pointer corresponding to y=0.25. 25% of the time, you would finish in fewer waves than whatever that x-value is.