摘要:
You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl 阅读全文
摘要:
Journey with Pigs Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 3004 Accepted: 922 Description Farmer John has a pig farm near town A. He 阅读全文