CareerCup

write a program to add all the non-diagonal elements of a 2D array.

Write a program to implement following logic
An employee can be promoted if
a) He has good communication skills
b) He is good in training
c) He is either good in programming or debugging.

Find unique integers from list of integers

# Question
# Write a function that will return an array of integers that occur exactly once in a given array of integers.
# e.g. For a list [1,2,3,5,2,2,3,4], return [1,5,4] since they appear once (order does not matter).

def once_integers(integers):

Follow up:
Optimize the code if input is sorted.

# What if the input is sorted, such as [1,2,2,2,3,3,4,5], could the algorithm be further optimized
# (e.g. space complexity)?

def once_integers_sorted(integers):

String Rotation. Given two string check if String1 is rotating match for String2

# Given two strings. Write a function that will return true if one string is a rotation of the other string.
# e.g. 'bca' and 'cab' are rotations of 'abc' and the function should return true
# 'barbazfoo', 'oobarbazf' and 'rbazfooba' are rotations of 'foobarbaz'

def is_rotation(string1, string2):

You are given a matrix of size n*m and need to count the number of submatrices which which have atleast k occurances of x and atleast two corner elements equal. Submatrices should have minimum two rows and two columns.

Example:

1 2 3
1 3 6
22 1 33

output: 4

i.e
a)

1 2
1 3

b)

1 2 3
1 3 6

c)

1 2
1 3
22 1

d)

1 3
22 1

Consider a string A containing exactly X characters. A variant of A, A(k), can be obtained by doing a cyclic shift of A starting from position k (0 <= k < X). The number of characters after the shift in A(k) will remain the same as they were in A. Every j-th character (0 <= j <= X-1) of A(k) is equal to (k+j)%X character of A. We will call A a classic word if there are exactly M positions k such that A(k) = A

You are given array Q containing exactly R strings. For each permutation s = (s[0], s[1], ..., s[R-1]) of integers between 0 and R-1, inclusive, we can define a string generated by this permutation as a concatenation Q[s[0]] + Q[s[1]] + ... + Q[s[R-1]]. Find the number of permutations that generate classic words. All indices in this problem are 0-based

Constraints

Set Q will contain between 1 and 8 elements, inclusive. Each element will have 1 to 20 characters, inclusive

M will be between 1 and 200, inclusive

Input Format

Line 1: comma separated strings representing set Q

Line 2: Integer M

Output Format

Number of permutations that generate classic words

Sample Input

CD,QCCD,QC

2

Sample Output

3

Explanation

The classic words are "CDQCCDQC" and "QCCDQCCD". Permutation 0, 1, 2 generates the first, and 1, 2, 0 and 2, 0, 1 generate the second

Your friend has invented a new compound consisting of N elements. However, he has forgotten the amount of each element that goes into the recipe.

For N-1 pairs of elements, he remembers the proportion in which the elements within each pair should be added to the compound. Fortunately, these N-1 proportions are sufficient to restore the recipe of the entire compound.

You are given N-1 proportions as String. Each String is formatted "#<a> and #<b> as <p>:<q>" (quotes for clarity), which means that the mass of element <a> divided by the mass of element <b> in the cocktail must be equal to <p>/<q> (all elements are 0-indexed). Print exactly N elements, where the first line is the mass of element 0 and second line is the mass of element 1 and so on... such that all the given proportions are satisfied and the total mass is as small as possible. The total mass must be greater than 0.

Input

Line 1: N

Line 2 .. N: proportion_i

Output

N lines of masses, as stated in the problem statement

Input Explanation

Line 1: N, the number of elements

Line 2 to line N: N-1 proportions, format described in the problem statement

Output Explanation

Output will contain exactly N lines, each line is the mass of the element such that all the given proportions are satisfied and the total mass is as small as possible. The total mass must be greater than 0.

Sample Input

3

#0 and #1 as 9:8

#1 and #2 as 9:8

Sample Output

81

72

64

Consider a social website SocialX, where friends connect to each other, just as they do on Facebook

Friendship on SocialX is symmetric (if X is a friend of Z, then Z is also a friend of X) however not transient (if X and Z are friends and Z and Y are friends, then X and Y are not necessarily friends)

The term "k-joined" is defined as follows. If two people are friends, they are called 1-joined. For k >= 1, two people X and Z are called (k+1)-joined if X and Z are k-joined, or if there exists a person Y such that X and Y are k-joined and Y and Z are friends.

"Approachable Score" is defined as follows. If two people X and Z are not friends, then their Approachable Score is the fewest number of people (other than themselves) who must be removed from the network in order for X and Z to not be 3-joined. The higher the Approachable Score, the more likely it is that X and Z know each other.

Given a set of friends containing exactly K elements, where K is the number of people in the network. People are numbered from 0 to K-1. The j-th character of the i-th element of friends is '1' if i and j are friends, and '0' otherwise. Return the Approachable Score for personX and personZ

Constraints

Set of friends will contain exactly K (1 < K < 41) elements, where each element will contain exactly K characters. Each character will either be '0' or '1'

friends[i][j] will always be equal to friends[j][i] and friends[i][i] will always be equal to 0

friend[personX][personZ] will be equal to 0 and personX will never be equal to personZ

Input Format

Line 1: comma separated K elements representing friends

Line 2: Integer representing personX

Line 3: Integer representing personZ

Output Format

Integer representing Approachable Score

Sample Input

0100,1010,0101,0010

0

3

Sample Output

1

Explanation

Either remove person 1 or person 2 to get an Approachable Score of 1 for person 0 and 3

An instruction pipeline has the speedup factor 10 while operation with 80% efficiency. What could be the number of stages in the pipeline?

Consider a four stage pipeline with the respective delays t1=60nSeconds, t2=70nSeconds, t3=100nSeconds, t4=80nSeconds and the latch delay of 10nSeconds. What is the approximate speedup when the very large number of instructions on pipeline?

Suppose that a system taken 90% of the computation can be parallelized, What is the maximum speedup we can except from 8 processors according to the Amdahl’s law?

Write a C program to convert date from 24 hrs format to 12 hrd format? Ex: 23:10 = 11:10PM

Given a sorted (increasing order) array, write a program to create a binary tree with minimal height

Write C program such that if an element in an MxN matrix is 0, its entire row and column is set to 0.

Consider a system with three processes and four resources. Resource R1 and R3 with one instance, R2 with two instance, process P1 holding an instance of R2 and waiting for r1,process P2 is holding an instance of R1 and R2 and waiting for R3,process P3 is holding an instance of R3. Is it possible to apply the Resource allocation graph algorithm to avoid deadlock? Explain.

Consider a disk drive with the specifications of 16 platters, 2 surfaces, 512 tracks, 2K sectors and 4KB page or sector size. What is the capacity of the disk drive in terms of bytes?

Consider a system where counting semaphore initialized to +17, on this semaphore variable the various operations like 23P, 18V, 16P, 14V and 1P are performed. Then what is the final value of semaphore?

Let the average process size be s bytes and the page size be p bytes. Furthermore, assume that each page entry requires e bytes. Derive the optimal page size.

Process ID Arrival Time Burst
P1 arrived at 0 and need10 units burst time, P2 is arrived at 1 and need 8 units of burst time, process P3 is arrived at 2 and need 6 units of burst time and process P4 arrived at 3 and need 4 units of burst time.
Assume that context switch takes one unit of time. Draw that gant chart and find the average waiting time, turnaround time using SJF scheduling.

Five jobs are waiting to be run. Their expected run times are 9, 6, 3, 5, and X . In what order should they be run to minimize average response time?

Problem statement: You are given a maze with N cells. Each cell may have multiple entry points but not more than one exit (ie. entry/exit points are unidirectional doors like valves). The cells are named with an integer value from 0 to N-1. You need to find the following :

Nearest meeting cell: Given any two cells - C1,C2, find the closest cell Cm that can be reached from both C1 and C2.

Note: Aim for O(Log(N)) solution.

INPUT FORMAT - First line has the number of cells N

Second line has list of N values of the edge[] array. edge[i] contains the cell number that can be reached from of cell ‘i’ in one step. edge[i] is -1 if the ‘i’th cell doesn’t have an exit.

Third line contains two cell numbers whose nearest meeting cell needs to be found. (return -1 if there is no meeting cell from the two given cells) .

OUTPUT FORMAT - Find nearest meeting cell (NMC).

Problem statement: You are given a maze with N cells. Each cell may have multiple entry points but not more than one exit (ie. entry/exit points are unidirectional doors like valves). The cells are named with an integer value from 0 to N-1. You need to find the following :

find Maximum number of entry points (incoming edges) for any cell in the maze

Note: Aim for O(N) solution.

INPUT FORMAT - First line has the number of cells N

Second line has list of N values of the edge[] array. edge[i] contains the cell number that can be reached from of cell ‘i’ in one step. edge[i] is -1 if the ‘i’th cell doesn’t have an exit.

OUTPUT FORMAT - Find max entry points in any cell.

Problem statement: You are given a maze with N cells. Each cell may have multiple entry points but not more than one exit (ie. entry/exit points are unidirectional doors like valves). The cells are named with an integer value from 0 to N-1. You need to find the following :

The length of the largest cycle in the maze. Return -1 if there are no cycles.

Note: Aim for O(N) solution.

INPUT FORMAT - First line has the number of cells N

Second line has list of N values of the edge[] array. edge[i] contains the cell number that can be reached from of cell ‘i’ in one step. edge[i] is -1 if the ‘i’th cell doesn’t have an exit.

OUTPUT FORMAT - length of the largest cycle.

Suppose there is a social networking site like Facebook. Every user gets some friend recommendations (i.e. People you may know!). Now, if there is a user A and he has 100 friends and each of his friends has got 5 other friends,A can get these 500 recommendations. But the condition is that he should only get the top 10 recommendations with whom he has the maximum number of mutual friends(If A and B are friends and B and C are friends, then A and C have a mutual friend, B). Suggest an efficient data structure for this and how to implement it. The implementation should be flexible as at any moment, any user can make new friends and he may also unfriend someone!

http://www.geeksforgeeks.org/find-water-in-a-glass/

Find the minimum of every sub-array of size k in an array of size n.

O(n) solution required.

http://www.geeksforgeeks.org/find-water-in-a-glass/

Find the minimum of every sub-array of size k in an array of size n.

O(n) solution required.

Searching for a string in a DOM tree. A complete working solution was required. Assume you have any string matching algorithm available.

(Based on Ctrl+F search in chrome)

Searching for a string in a DOM tree. A complete working solution was required. Assume you have any string matching algorithm available.

(Based on Ctrl+F search in chrome)