摘要： 描述 The cows have reconstructed Farmer John's farm, with its N barns (1 <= N <= 150, number 1..N) after the terrible earthquake last May. The cows didn 阅读全文

摘要： 描述 Given a sequence, we define the seqence's value equals the difference between the largest element and the smallest element in the sequence. As an e 阅读全文