摘要:
Nearest Common Ancestors Description A rooted tree is a well-known data structure in computer science and engineering. An example is shown below: In t 阅读全文
摘要:
A Magic Lamp Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Problem Description Kiki likes traveling. One day she fi 阅读全文