摘要：
Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a g 阅读全文
摘要：
Description Chosen Problem Solving and Program design as an optional course, you are required to solve all kinds of problems. Here, we get a new probl 阅读全文