摘要： Best Cow Line Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 20226 Accepted: 5563 Description FJ is about to take his N (1 ≤ N ≤ 2,000) co 阅读全文

摘要： Ants Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 15617 Accepted: 6753 Description An army of ants walk on a horizontal pole of length l 阅读全文

摘要： Given integers, count the number of pairs of integers whose difference is . Given integers, count the number of pairs of integers whose difference is  阅读全文