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.
Answer
Python Code -
Note : Refer the below link for groupby functionality if you are not familiar -
https://www.geeksforgeeks.org/python-pandas-dataframe-groupby/
2. Solve the below word order problem using Python code -
Sample Input
4
bcdef
abcdefg
bcde
bcdef
Sample Output
3
2 1 1
Explanation
There are distinct words. Here, "bcdef" appears twice in the input at the first and last positions. The other words appear once each. The order of the first appearances are "bcdef", "abcdefg" and "bcde" which corresponds to the output.
Answer-
Python Code -
Note : Refer the below link for counter functionality if you are not familiar -
https://www.guru99.com/python-counter-collections-example.html
3. Solve the below Words Score problem using Python code -
Sample Input 0
2
hacker book
Sample Output 0
4
Explanation 0
There are two words in the input: hacker
and book
. The score of the word hacker
is because it contains an even number of vowels, i.e. vowels, and the score of book
is for the same reason. Thus the total score is .
Sample Input 1
3
programming is awesome
Sample Output 1
4
Explanation 1
There are words in the input: programming
, is
and awesome
. The score of programming
is since it contains vowels, an odd number of vowels. The score of is
is also because it has an odd number of vowels. The score of awesome
is since it contains vowels, an even number of vowels. Thus, the total score is .
Answer -
Python Code
4. Solve the below hacker rank problem using python -
You and Fredrick are good friends. Yesterday, Fredrick received credit cards from ABCD Bank. He wants to verify whether his credit card numbers are valid or not. You happen to be great at regex so he is asking for your help!
A valid credit card from ABCD Bank has the following characteristics:
► It must start with a , or .
► It must contain exactly digits.
► It must only consist of digits (-).
► It may have digits in groups of , separated by one hyphen "-".
► It must NOT
use any other separator like ' ' , '_', etc.
► It must NOT
have or more consecutive repeated digits.
Sample Input
6
4123456789123456
5123-4567-8912-3456
61234-567-8912-3456
4123356789123456
5133-3367-8912-3456
5123 - 3567 - 8912 - 3456
Sample Output
Valid
Valid
Invalid
Valid
Invalid
Invalid
Explanation
4123456789123456 : Valid
5123-4567-8912-3456 : Valid
61234--8912-3456 : Invalid, because the card number is not divided into equal groups of .
4123356789123456 : Valid
51-67-8912-3456 : Invalid, consecutive digits is repeating times.
5123456789123456 : Invalid, because space ' ' and -
are used as separators.
Answer - Python code :
5.