Four absolutely selfish, greedy and extremely smart people got the 100 gem together.

1. First of all, A's most direct opponent is that B will not raise his hand to support it, because only by eliminating A can B have the right to distribute;

2. D at the bottom of the normal ranking will not raise his hand to support it, because D hopes that you will all be eliminated and get a unique gold coin; But if A is eliminated, B will try to win over C, and C can only support B unconditionally, because if B is eliminated, only C and D will be left, and D will definitely not support C, so B will give C a gold coin, and D will have nothing.

3. So as long as A gives C 2 gold coins and D 1 gold coins (compared with the latter scheme, it can get the most), it will get more than 50% support and get 97 gold coins by itself.