5个砝码用天平称重时,我们希望用尽可能少的砝码组合称出尽可能多的重量。如果只有5个砝码,重量分别是1,3,9,27,81。则它们可以组合称出1到121之间任意整数重量-The 5 weights weighed in the balance, we want to use as little as possible weight combinations, said as much weight. If only five weights, weight 1,3,9,27,81. They ca