急问什么信用卡的点数可以转国内南航的里程？ (转载)# Money - 海外理财
s*r
1 楼
大家有什么思路么？
How would you define a data structure that stores a set of values (i.e., a
value cannot appear more than one time), and implements the following
functions:
add(p)--adds the value p to the set
delete(p)--removes the value p from the set
getrandom()--returns a random value from the set (all items should be
equally likely). (Assume you have access to some nice random() function.)
How would you define a data structure that stores a set of values (i.e., a
value cannot appear more than one time), and implements the following
functions:
add(p)--adds the value p to the set
delete(p)--removes the value p from the set
getrandom()--returns a random value from the set (all items should be
equally likely). (Assume you have access to some nice random() function.)
