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The joke of the magic road

Restore problem (push back)

It turns out that this man has 85 yuan money on him and 43 yuan in the box.

Person: 85 (-43) → 42 (x2) → 84 (-44) → 40 (x2) → 80 (-48) → 32 (x2) → 64.

Bridges: 43 (x2) → 86 (-42) → 44 (x2) → 88 (-40) → 48 (x2) → 96 (-32) → 64.