摘要：
Description There is a pile of n wooden sticks. The length and weight of each stick are known in advance. The sticks are to be processed by a woodwork 阅读全文
摘要：
People in Silverland use coins.They have coins of value A1,A2,A3...An Silverland dollar.One day Tony opened his money-box and found there were some co 阅读全文