since pd6491 ruined my other riddle, heres another one:
4 guys go camping and they have to cross a bridge. in order to cross a bridge, they need the flash light, and the bridge can only hold two peoples weight.
1st guy takes 1 min.
2nd guy takes 2 min.
3rd guy takes 5 min.
4th guy takes 10 min.
when going in pairs, you have to go by the slower persons time, and someone has to come back to give the flashlight to the next pair.
what is the shortest amount of time to be taken for all of the campers to cross the bridge? and what are the combinations of pairs for that time?
(if i told you how can they cross the bridge in "this many" min., that would be too easy)
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