雲泥有別 尘亦生辉

The Last Puzzle Time Limit: 2 Seconds      Memory Limit: 65536 KB      Special Judge  There is one last gate between the hero and the dragon. But opening the gate isn't an easy task. There

Brackets Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 8027   Accepted: 4264 Description We give the following inductive definition of a “regular brack