There is 12 balls.. divide them into piles of 4
: P8 h% _% Z8 i8 M: m* LTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。so 3 groups for 4..name is A,B,C$ ~" x7 T, V" p8 _/ q& G
case 1:
( z5 o# R$ e5 O' i7 L6 ttvb now,tvbnow,bttvbmeasure A -- B tvboxnow.com& \: Y* Y( N. g# W) ^$ h1 T: V. Q
A or B is heavier
+ ?1 F4 a& I( d7 `; }tvboxnow.comdivide that group into 2 by 2
6 I0 n% D% m0 q/ r5 L) y2 kthen divide heavier group into 1 by 1
+ R) M% B$ F2 H; E! fTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。
* ~$ l' d" S& v# Z, Y. o/ C6 Y% Qtvb now,tvbnow,bttvbcase 2:
5 t& g3 R8 G) ?, C! Etvb now,tvbnow,bttvbA and B is the same.. therefore C has the heavier ball
( _: b$ C& w% Xdivide C into 2 by 2
* N3 U4 v, S4 X) ?then divide heavier group into 1 by 1..
& v" r6 b! @2 o; y$ e7 b0 m; p* Y9 f/ a ?2 ~7 o' t
got it in 30 seconds.. not so hard -.-' |
發表於 2006-12-8 01:06 PM
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