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2025-06-23 07:05本頁(yè)面
【正文】 直到到達(dá)迷宮的出口點(diǎn)(m,n)為止，然后從出口點(diǎn)沿搜索路徑回溯直至入口。m a lasagna hog! is a palindrome.Hanna is not a palindrome.回文串的判斷，利用棧Degrees of separationFind out how many people separate one person from another.The number of people will be no more than 20.InputA positive integer representing the number of people in the following list. Each line in the list contains the name of a person, followed by the number of people that person knows, followed by the names of those people. Following this list is a positive integer denoting the number of cases. Each case consists of a starting name and a goal name. Names will not contain any blanks or nonalphabetic characters.OutputThe phrase “start has no connection to goal.” or the phrase “start is separated from goal by num degrees.”, where start is the starting name, goal is the goal name, and num is the number of degrees of separation between the two.Sample Input5Bob 3 Tom John JimSam 2 Bob JohnJohn 2 Tom BobTom 1 SamJim 03Jim SamSam JohnJohn SamSample OutputJim has no connection to Sam.Sam is separated from John by 0 degrees.John is separated from Sam by 1 degrees.提示：有向圖求路徑長(zhǎng)度1MarriageNow, a lot of persons holding their marriages together are in fashion. One day, a lot of people hold their marriages together. They are all happy, so they want to play a game. They stand in two lines, one faces one. The men are in one line, the women are in another. They stand arbitrarily. Then, there will be some red lines to link each couple. So can you calculate how many pairs of the red lines are overlaped（交叉）.InputThere are several cases in the input, each case begin with a postive integer N(N=300000), which means there are N couples, 0 means the end of the file. The following 2 lines each consists of N integers. Each integer represents a couple. The first line are men, the second are women.OutputFor each case output how many pairs of lines are overlaped.Sample Input31 2 33 2 131 2 31 2 30 Sample Output30 利用數(shù)組實(shí)現(xiàn)此題。 if A is adjacent to B, then B is necessarily adjacent to A. Also, since the repeaters lie in a plane, the graph formed by connecting adjacent repeaters does not have any line segments that cross.OUTPUTFor each map (except the final one with no repeaters), print a line containing the minumum number of channels needed so that no adjacent channels interfere. The sample output shows the format of this line. Take care that channels is in the singular form when only one channel is required.SAMPLE INPUT2A:B:4A:BCB:ACDC:ABDD:BC4A:BCDB:ACDC:ABDD:ABC0SAMPLE OUTPUT1 channel needed.3 channels needed.4 channels needed.提示：此題中借助圖論中四色猜想問(wèn)題解決 repeater :中繼器，網(wǎng)絡(luò)設(shè)備 Channel 信道求回文串Given a character string, determine if it is a palindrome. A palindrome is a word or phrase that reads the same forwards and backwards, like mom or noon. For our purposes, palindromes ar
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