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lieren (firstblood--pally) 于 (Wed Jan 3 22:29:58 2007) 提到:
" You are given 5 bags containing 100 coins each. The bags can contain
c
oins of 3 different types that look identical. The first type weighs 9 g
rams, the second type 10 and the third type 11 grams. Each bag contains
coins of equal weight but you do not know how many of the 5 bags are of
the different types. (i.e. all 5 bags might well contain 9 gram coins as
far as you are concerned).
