Consider the following problem. You are given a list of words, each con-sisting of a sequence of one or more letters. The goal is to arrange thewords in a sequence so that:⚫the last letter of the first word is the same as the first letter of the secondword⚫the last letter of the second word is the same as the first letter of the thirdword.... and so on...⚫the last letter of the next-to-last word is the same as the first letter of thelast word1For a given sequence of words, we could ask the question, "is it possible toarrange the entire list of words into one such sequence?" Argue that thisproblem is in NP.Argue whether the problem posed in the question 2 above is in P.

Approach to solving the question:Let's delve into the fascinating world of computational complexity…

Answered: Consider the following problem. You are…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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You are given a string X of length n and another string Y of length m ≤n. Say,the indexes p1, p2, p3, p4 and q1, q2, q3, q4 form two sub-sequences, i.e., 0 ≤ p1 < p2 < p3 < p4 < nand 0 ≤q1 < q2 < q3 < q4 < n; then, they are non-overlapping if p4 < q1.The task is to count the maximum number of non-overlapping sub-sequences of X that are thesame as Y . Thus, if X = GAXTYAWBGTAUGBTABGRGTAXB and Y = GTAB, then the answer is3 as shown by the red fonts. We cannot select the underlined GTAB as it overlaps with a red GTAB(i.e., among overlapping sub-sequences, you can select only one of them).Describe an O(m + n) time algorithm to obtain the count. Write a pseudo-code.
In this task, we would like for you to appreciate the usefulness of the groupby() function of itertools . To read more about this function, Check this out . You are given a string . Suppose a character '' occurs consecutively times in the string. Replace these consecutive occurrences of the character '' with in the string. For a better understanding of the problem, check the explanation. Input Format A single line of input consisting of the string . Output Format A single line of output consisting of the modified string. Constraints All the characters of denote integers between and . Sample Input 1222311 Sample Output (1, 1) (3, 2) (1, 3) (2, 1) Explanation First, the character occurs only once. It is replaced by . Then the character occurs three times, and it is replaced by and so on. Also, note the single space within each compression and between the compressions.
Given a 2D list of characters and a list of tuples containing replacement pairs, write Pythoncode to replace each character in the list with its replacement. The tuples are of the form (current_char,replacement_char). Print out your list with each row on a new line. For example, given the following listand its replacement pairs: data = [['a','p','p','l','e'], ['b','a','n','a','n','a'], ['c','h','e','r','r','y']] replacements = [('a', 'X'),('b', 'Y'),('c', 'Z')] The output after replacement is: Xpple YXnXnX Zherry
In this question, you are asked to trace the Naïve Bayes algorithm for classification on some toy sentences, and then to consider some variants. The following five sentences are the training data: (the number in parentheses indicates the category that each sentence belongs to) The dog barked. (1)The mouse ran up the clock. (2)The dog ran away. (1)The collie dog barked. (1)A mouse ate the cheese. (2) The following three sentences are the test data: t1 = A dog barked loudly.t2 = The dachshund ran up the hill.t3 = The rodent nibbled the cheese. To which category does the algorithm assign each of the test sentences? Use Laplace smoothing (Add 1 smoothing). Please show your calculations and upload your solution copy .
9. Suppose you are searching for a girls name written using only the lettersD, N and A. You have the letters ordered alphabetically (A, D, N)and you start writing down possibilities:A, D, N, AA, AD, AN, DA, DD, DN, NA, ND, NN, ...(a) How many strings of four or fewer letters are there where theletters are D, N or A?(b) In the above possibilities, are you searching in a depth first orbreadth first way?(c) What are the next three possible names you would write down?(d) How many possibilities will you write down ANNA?
Problem Alice was given a number line containing every positive integer, x, where 1<=x<=n. She was also given m line segments, each having a left endpoint, l (1<=l<=n), a right endpoint, r (1<=r<=n), and an integer weight, w. Her task is to cover all numbers on the given number line using a subset of the line segments, such that the maximum weight among all the line segments in the chosen subset is minimal. In other words, let S=(l1,r1,w1),(l2,r2,w2),....,(lk,rk,wk), represent a set of k line segments chosen by Alice, max(w1,w2,...,wk) should be minimized. All numbers 1,2,....n should be covered by at least one of k the chosen line segments. It is okay for the chosen line segments to overlap. You program should output the minimized maximum weight in the chosen subset that covers all the numbers on the number line, or -1 if it is not possible to cover the number line. Input format The first line of the input contains an integer, n - denoting the range of numbers…
Give a succinct breakdown of the differences between a lookup function that uses a lookup table and nested if statements. Why is utilizing a table and lookup function more practical and efficient? Give an instance.
Please write a python program with explanation data structure& algorithm and time &space complexity Given a list of [personName, accessTime], for each person, return the earliest 1-hour interval in which he has swipe badges 3 or more times, e.g.[A, 0], [A, 5], [A, 59], [A, 60] ,[A, 61]return [A, 0], [A, 5], [A, 59], [A, 60] not [A, 5], [A, 59], [A, 60] ,[A, 61]
Computer Science Given a dataframe with two columns (x and y), I have found a function on Python that gives a local fit value (essentially between two set values x it gives the average of all values of y). Now the questions asks us to create 2 graphs - one that shows the average per value of x and another one that shows the difference to that average that we found. What does this mean?
We consider certain strings of length 6 over the alphabet S = {A,B,C}. We require that the string contains exactly two As, and exactly two B's, and exactly two C's. How many such strings are there? That is, how many strings of length 6 over the alphabet {A,B,C} contains exactly two A's, two B's and two C's?
Finally, we will do some simple analysis – ranking of words. Write a function word_ranking(corpus, n, sort_index) which takes input parameters corpus (type list), n (type int), and sort_index (type int) and returns a list containing tuples of words and their frequencies in the top n of words. Here, corpus is a list of sentences. n is the number of ranked words to return. The resulting list should then be sorted based on the sort_index; sort_index = 0 should sort the list of tuples in ascending alphabetical order, while sort_index = 1 should sort the list of tuples by the frequencies in descending order. All other numeric values for sort_index should return an empty list (don't need to consider non-integer inputs). For example, we have: corpus = ['hi hi hi hi', 'hello hello say bye', 'bye bye']n = 3sort_index = 1 The function should return: [('hi', 4), ('bye', 3), ('hello', 2)] While sort_index = 0 should return: [('bye', 3), ('hello', 2), ('hi', 4)] You can assume n would…
Computer Science Draw the TST that results from inserting the following strings into an initially empty trie now is the time for all good people to come to the aid of

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