With a balance and 11 weights whose weights are all integer grams, you can directly weigh the weight of all integer grams from 1-2002 (weighing weights can only be placed on one side of the balance), among these weights, how much is the heaviest one
用一架天平和11个重量均为整数克的砝码，可以直接称出1-2002的所有整数克数的重量(称时砝码只能放在天平的一边)，在这些砝码中，最重的一个为多少
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