题目:
Design a data structure that supports all following operations in averageO(1) time.
insert(val): Inserts an item val to the set if not already present.
remove(val): Removes an item...
Harmonic Number
In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers:
In this problem, you are given n, you have to find&nb...
In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers:
In this problem, you are given n, you have to find Hn.
InputInpu...
In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers:
In this problem, you are given n, you have to find Hn.
Input
Inpu...