摘要：
In Complexity theory, some functions are nearly O(1) O (1), but it is greater then O(1) O (1). For example, the complexity of a typical disjoint set i 阅读全文
摘要：
D. Power Tower time limit per test 4.5 seconds memory limit per test 256 megabytes input standard input output standard output Priests of the Quetzalc 阅读全文