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4 个。。。详解见内。

kakaka (小胖子)
1) A,B,C to 1/2 point
- A takes 1/4 from B & C and moves on (A now has full supply)
- B, C make way back with 1/4 supply each
2) A gets to 3/4 point
B, C gets to 1/4 point
D gets to 1/4 point, gives B,C 1/4 supply each
B,C,D all return
3) A gets to destination (1/2 supply)
B, C, D to starting point
4) A returns to 3/4 point
B, C, D gets to 1/4 point, D returns, B, C moves on with full supply each (1/4 each from D)
5) A returns to 1/2 point (0 supply)
B, C gets to 1/2 point (3/4 supply each) <-- enough to get all 3 home
A, B, C all return
(#11603528@0)
2018-6-29 -04:00
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