入门级编程通关练习题 #1 – 二进制加法
实现一个函数，将两个数字A，B 相加并以二进制形式返回其和，转换可以在加法之前或之后进行。返回的二进制数据类型为字符串。 输入范例： A= 6， B= 8 输出范例： “1110” 说明：6 + 8 = 14，十进制数字14的二进制格式为 1110。 算法思路： 可以使用函数 bin()得到数字的二进制格式，然后做字符串切片去掉前缀"0b"。
Data Structure & Algorithm: Level-1 Problem #64. Permutation and Combination -2
Given a list of N (6 < N < 10) positive integers. Using one integer as the lead number and times 10N-1 to get a threshhold value. Find out how…
Data Structure & Algorithm: Level-1 Problem #63. Permutation and Combination-1
Given two positions A and B in a 3D coordinate system. Find out how many ways to go from A to B to reach the shortest path possible, and we…
Data Structure & Algorithm: Level-1 Problem #62. Combination with Catalan Numbers
In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems, often involving recursively defined objects. They are named after the Belgian mathematician…
Data Structure & Algorithm: Level-1 Problem #61. Factorial and Combination-2
Given N dots that are evenly spaced on the circumference of a circle, how many combinations of three dots can we pick from those N dots that do not form…
Data Structure & Algorithm: Level-1 Problem #60. Factorial and Combination-1
In mathematics, a combination is a selection of items from a collection, such that the order of selection does not matter (unlike permutations). To choose m items from a total…
Data Structure & Algorithm: Level-1 Problem #59. Factorial and Permutation-3
Given a round table, with N male and N female guests（1 < N < 10）, how many ways we can arrange them such that the sexes alternate? Sample Input: N…
Data Structure & Algorithm: Level-1 Problem #58. Factorial and Permutation-2
Given the position for two points A and B on the Cartesian plane. Find out how many ways to move from point A to point B to achieve the shortest…
Data Structure & Algorithm: Level-1 Problem #57. Factorial and Permutation – 1
In mathematics, the factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n: Following table shows the values…
Data Structure & Algorithm: Level-1 Problem #56. Unix Timestamp
The Unix Time stamp is a way to track time as a running total of seconds. This count starts at the Unix Epoch on January 1st, 1970 at UTC. Therefore,…