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2016-01-15

Happy Number

Write an algorithm to determine if a number is happy.

2016-01-15

Hash Function

在数据结构中，哈希函数是用来将一个字符串（或任何其他类型）转化为小于哈希表大小且大于等于零的整数。一个好的哈希函数可以尽可能少地产生冲突。

2016-01-15

The Heavy Pill

You have 20 bottles of pills. 19 bottles have 1.0 gram pills, but one has pills of weight 1.1 grams.

2016-01-15

Index of Permutation II

给出一个可能包含重复数字的排列，求这些数字的所有排列按字典序排序后该排列在其中的编号。编号从1开始。

2016-01-15

Index of Permuation

给出一个不含重复数字的排列，求这些数字的所有排列按字典序排序后该排列的编号。其中，编号从1开始。

2016-01-15

Jugs of Water

You have a five-quart jug, a three-quart jug, andn an unlimited supply of water (but no measuring cups).

2016-01-15

Max Points on a Line

Given n points on a 2D plane, find the maximum number of points that lie on the same straight line.

2016-01-15

Next Permutation

Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of nu

2016-01-15

Number of Digit One

Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equa

2016-01-15

Number of Digit

计算数字k在0到n中的出现的次数，k可能是09的一个值

Happy Number

Hash Function

The Heavy Pill

Index of Permutation II

Index of Permuation

Jugs of Water

Max Points on a Line

Next Permutation

Number of Digit One

Number of Digit

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