The Joy of Computing using Python NPTEL Week 6 Programming Assignment Solution 2021 February

 The Joy of Computing using Python NPTEL Week 6 Programming Assignment  Solution 2021 February

Programming Assignment 1:

Week 6 Programming Assignment 1                                    Due on 2021-03-04, 23:59 IST

Number Triangle-2

Given an integer input 'n', print a palindromic number triangle of n lines as shown in the example.

Input Format

The input contains a number n (n < 10)

Output Format

Print n lines corresponding to the number triangle 

Example:

Input:

5

Output:

1

121

12321

1234321

123454321

Solution:

n=int(input())

for i in range(1,n+1):

  for j in range(1,i+1):

      print(j,end="")

      if i==j:

        for k in range(i-1,0,-1):

            print(k,end="") 

  if i!=n:

    print("")

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Programming Assignment 2:

Week 6 Programming Assignment 2                                       Due on 2021-03-04, 23:59 IST

Anagrams

Given two strings as input, determine if they are anagrams are not. (Ignore the spaces, case and any punctuation or special characters)

Note: Anagrams are the strings which are made up of the same set of letters. For example : Mary and Army are anagrams.

Input Format

First line of the input contains the first string

Second line of the input contains the second string

Output Format:

Print Yes if the given strings are anagrams, No otherwise.

Example:

Input:

Tom Marvolo Riddle

I am Lord Voldemort!!!

Output:

Yes

Solutions:

(s1,s2,x,w)=(input(),input(),[],[])

R=sorted(list(s1.upper()))

S=sorted(list(s2.upper()))

for f in R:

if f.isalnum():

w.append(f)

for f in S:

if f.isalnum():

x.append(f)

if x==w:

  print("Yes",end="")

else:

  print("No",end="")

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Programming Assignment 3:

Week 6 Programming Assignment 3                                       Due on 2021-03-04, 23:59 IST

Break the Secret

You are hired by a secret service agency. Your job is to decode messages. You figure out the algorithm used to encrypt messages and it turns out to be as follows:

The message will consist of only uppercase alphabets. The positional values are assigned to the characters as A=0, B=1, ..., Y=24 and Z=25. In the original message, a character at position i is replaced by a character using the shift formula (i+3)%26.

For example A will be replaced by D, B by E an so on. After replacement, the string is reversed and sent as a message.

You are required to decode this message through your code.(Assuming No Space in the message)

Input Format

A single line of the input contains the encrypted message

Output Format

Print a string containing the original message after decoding

Example:

Input

HBEGRRJ

Output:

GOODBYE

Solutions:

(s,a,b,c)=(input(),"","","")

for i in list(s):

a=a+chr((ord(i)-65+3)%26+65)

for g in list(a)[::-1]:

    b=b+g 

for t in list(b):

      if t=='A':

        c=c+'U'

      elif t=='B':

        c=c+'V'

      elif t=='C':

        c=c+'W'

      elif t=='D':

        c=c+'X'

      elif t=='E':

        c=c+'Y'

      elif t=='F':

        c=c+'Z'

      else:

        c=c+chr(ord(t)-6)

print(c,end="")

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