2018PayPal实习生招聘笔试-交大考场

小明热衷于买足球彩票多年而苦苦不能中奖。经过他近日的潜心研究，小明发现了一个提高中奖几率的方法。已知足球比赛有胜、负、平三种结果，小明的方法是，如果买一张含有n场比赛的彩票，那么相邻两场比赛的结果不能相同，且第一场比赛和最后一场比赛的结果也不能相同。请你帮小明算算，符合条件的彩票有多少种

输入描述： 输入一个整数N（0<=N<=50)，表示比赛的场数输入样例： 3 输出描述： 输出一个整数M，表示满足条件的情况数输出样例 6

Input a hexadecimal IPV6 address, store it into 4 integers and output them.

输入描述： The input data contains 8 groups of colon-separated numbers(letters are uppercase), each group has 4 numbers(leading 0 can be omitted or not), all in hexadecimal.输入样例： 0:001:000:02:0000:A:FFFF:FFFF 输出描述： The output contains 4 integers(without leading zeros) separated by spaces.输出样例 1 2 10 -1

Alice made some changes to a text file and she wants to know which lines are changed and compare the before and after line contents. Can you help her with this? 输入描述： The first line contains two integers m (1  m  1000) and n (1  n  1000) – the number of lines in the original text and in the modified text separately. The following m lines are the original text and the next n lines compose the modified text. The length of each text line is in the range [0, 100]. Note that m may not be equal to n.输入样例： 3 4 a bb ccc aa bb ccc dddd 输出描述： The result of the comparison is based on original text. If one line is not modified, just output the line with one leading space ‘ ‘. If this line is modified, output two lines: the original line leading with a ‘-‘ and the modified line leading with a ‘+’.输出样例 -a +aa bb ccc +dddd