送交者: AQuestion 于 2005-6-11, 15:24:22:

回答: 放松一下，智力题若干 由 BOQ 于 2005-6-11, 08:42:02:

There are many ways to keep 4 fire fronts. As long as you
keep 4 fire fronts. When the fire finishes, it will be
15 minutes. One way: light all 4 ends, when one finishes,
you light the middle of the remaining one, and keep this
process till the end.

• The burning speed can be different, but must be independent of direction - AQuestion (39 bytes) 2005-6-11, 15:26:46

加跟贴