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irga5000 [103]
3 years ago
7

A binary tree is full if all of its vertices have either zero or two children. Let Bn denote the number of full binary trees wit

h n vertices.
(a) By drawing out all full binary trees with 3, 5, or 7 vertices, determine the exact values of B3, B5, and B7. Why have we left out even numbers of vertices, like B4?


(b) For general n, derive a recurrence relation for Bn.

(c) Show by induction that Bn is (2n). 2.14. You are given an array of n elements, and

Computers and Technology
1 answer:
Arlecino [84]3 years ago
7 0

Answer:

(a) B_3 = 1\\B_5 = 2\\B_7 = 5

(b) See attached

(c) B_n = 2^{(n-3)/2}

Explanation:

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Answer:

Input: [email protected]

Output: the word is not an email adress

Explanation:

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Date Time Manipulation Exploration If you start from Jan 1st, 1757, and repeatedly add 8 days, until you hit 1800, how many time
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Answer:

from datetime import datetime, date, timedelta

def count_weekdays(start_date, add_days, stop_year, weekday):

   my_date = start_date

   m = 0  

   while my_date.year != stop_year:  

       my_date = my_date + timedelta(days = add_days)

       if my_date.isoweekday() == weekday:

           m += 1

   return m

date_val = date(1757,1,1)

try:

   date_val = datetime.fromisoformat(input("Enter date in the format yyyy-mm-dd: "))

except ValueError:

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Explanation:

The datetime package of the python programming language has several time modules like the date, datetime, pytz, timedelta, etc, used to manipulate date and time in documents. The function count_weekdays has four parameters and returns the number of a specified weekday in a period of time.

4 0
3 years ago
write a C program that declares an integer variable called "favorite_number". The program should then prompt the user to enter t
Arturiano [62]

Answer:

// here is code in C.

// headers

#include <stdio.h>

// main function

int main(void) {

// variable declaration

int favorite_number;

 // ask user to enter favorite number

printf("enter your favorite number : ");

 // read the number

scanf("%d",&favorite_number);

 // print the message

printf("your favorite number is: %d",favorite_number);

return 0;

}

Explanation:

Declare a variable "favorite_number" of integer type.Ask user to enter favorite number and assign it to favorite_number.Then print the message which include the favorite number.

Output:

enter your favorite number : 77

your favorite number is: 77

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4 years ago
Analog method is also known us
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Hamilton is the best
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Answer:

Yes he is

Explanation:

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