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In this blog you will be able to learn python-programming language and problem solving. You can also find solutions for hackerrank problems, google coding problems.

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Python3 hackerRank exercise with solutions (Set 2)

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  1.  Cab and Walk Arun is working in an office which is N blocks away from his house. He wants to minimize the time it takes him to the from his house to the office. He can either take the office cab or he can walk to the office. While walking Arun's velocity is V1 m/s  and V2 m/s  is the velocity of cab. But when he calls the cab it always starts from the office, covers N blocks, collects Arun and goes back to the office. The cab crosses a total distance of N meters when going from office to Arun's  house and vice versa , whereas Arun covers a distance of √2*N while walking. Help Arun to decide whether he has to walk or to take the cab to save the time. Input format : A single line containing three integers N, V1 and V2 separated by space. Output format : Print "Walk" or "Cab" accordingly. Sample input 1 : 5  10  15 Sample output 1 : Cab Sample input 2 : 2  10  14 Sample output 2 : Walk Code : Output : 2.  End - Sort Given a list A of ...
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Finding the percentage in python - HackerRank solution

Solution for hackerRank problem Finding the percentage in python Problem : The provided code stub will read in a dictionary containing key/value pairs of name:[marks] for a list of students. Print the average of the marks array for the student name provided, showing 2 places after the decimal. Example The  query_name  is 'beta'. beta's average score is  . Input Format The first line contains the integer  , the number of students' records. The next lines contain the names and marks obtained by a student, each value separated by a space. The final line contains  query_name , the name of a student to query. Constraints 2<=n<=10 0<=marks[i]<=100 length of marks arrays = 3 Output Format Print one line: The average of the marks obtained by the particular student correct to 2 decimal places. Sample Input 0 3 Krishna 67 68 69 Arjun 70 98 63 Malika 52 56 60 Malika Sample Output 0 56.00 Explanation 0 Explanation 0 Marks for Malika are   whose av...
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Nested lists in python - HackerRank solution

Solution for hackerRank problem Nested lists in python Problem : Given the names and grades for each student in a class of students, store them in a nested list and print the name(s) of any student(s) having the second-lowest grade. Note:  If there are multiple students with the second lowest grade, order their names alphabetically and print each name on a new line. Example records=[ ["chi", 20.0], ["beta", 50.0], ["alpha", 50.0] The ordered list of scores is [20.0, 50.0], so the second lowest score is 50.0  . There are two students   with that score:    [" beta ",  "alpha" ]   . Ordered alphabetically, the names are printed as: alpha beta Input Format The first line contains an integer, N, the number of students. The 2N  subsequent lines describe each student over 2  lines. - The first line contains a student's name. - The second line contains their grade. Constraints 2<=N<=5 There will always be one or more students having t...
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