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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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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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HackerRank challenges with solutions (Rearrangement, Formula, Word sorting, Numbers, Sentence)

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  1.  Rearrangement Given a list A elements of length n , ranging from 1 to n. All elements may not be present in the array. If the element is not present then there will be -1 present in the array. Rearrange the array such that A[i]=i and if i is not present display -1 at that place. Input format : The first line contains a n numbers with each number separated by space. Output format : Print the elements of the list after modification. Sample input : -1 -1 6 1 9 3 2 -1 4 -1 Sample Output : -1 1 2 3 4 -1 6 -1 -1 9 Explanation : The modified list contains elements such that A[i]=i . Code : Output :   2.  Formula Write a program that calculates and prints the value according to the given formula , Q=square root of [(2*C*D)/H]. Following are the fixed values of C and H , C=50 ,H=30. D is the variable whose values should be input to your program in a comma separated sequence. Input format : A sequence of values for D with each value separated by comma. Output format : Pr...
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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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