Hostages

PKJ

 Practice Questions 

 Hostages 

 Problem Statement 

Professor have barricades of different length and he wants to store hostages by making a boundary using those barricades, but the professor realized that he can only use three barricades to store a group and they should be attached end to end so no one can escape, tell the professor how many possible ways are to assemble barricades.

 Boundary Condition(s) 

1 <= t <= 10³
1 <= n <= 10³
1 <= a[i] <= 10⁶

 Input Format 

First line represents the number of test cases.
Second line represents the number of barricades.
Third line represents the input array.

 Output Format 

Total possibility to arrange barricades.

 Example Input/Output 1 

 Input 

1
5
6 7 4 9 1

 Output 

4

 Explanation 

Possible arrangements are
9 4 7
9 4 6
7 4 6
7 4 9
so there are 4 possible arrangements.

Solution for Hostage

Comments

Anonymous said…
Please post code after sometime bro
January 24, 2022 at 9:05 AM
Post a Comment

Popular Posts

Vaccine Distribution

PKJ
 Coding Problem Keys   Vaccine Distribution    Problem Statement  There is a large manufacturer of vaccine which produces M types of vaccines (whose formulas are derived from different pharma brands). The manufacturer needs to divide all the vaccines between N dealers. It is acceptable if some dealers do not get any vaccine. However, no dealer wants vaccine of different kinds which means that all vaccines that a dealer gets need to be of the same type. The manufacturer also knows that dealers will be jealous if a dealer gets too many vaccines. As an approximation, the jealousy level among the dealers is defined as the largest number of vaccines given to any dealer.  Task  Help the manufacturer to divide all the vaccines among the dealers such that the jealousy level is minimized.  Example  Assumptions N = 5 M = 2 arr = [7, 4]  Approach  There are 7 vaccines of 1st type and 4 vaccines of 2nd type. Let the two types be defined by...
Click to Continue...

String Rotation Odd and Even Positions

PKJ
 Coding Problem Keys   String Rotation Odd and Even Positions   Problem Statement  A string S and two integers M and N are passed as input. The program must rotate the characters present in the odd positions of the string M times and rotate characters present in the even positions of the string N times.  Boundary Condition(s)  2 <= Length of the string <= 1000. 1 <= M, N <= 1000.  Input Format  The first line contains the values of S, M and N separated by space(s).  Output Format  The first line contains the rotated string.  Example Input/Output 1   Input  technology 2 3  Output  logotycenh  Explanation  The characters present in the odd positions are 'tcnlg'. When rotated 2 positions, the value is 'lgtcn'. The characters present in the even position are 'ehooy', When rotated 3 positions, the value is 'ooyeh'. Hence the rotated string value is 'logotycenh'.  Example Input...
Click to Continue...

Highly Profitable Months

PKJ
 Coding Problem Keys   Highly Profitable Months   Problem Statement  The stocks of a company are being surveyed to analyse the net profit of the company over a period of several months. For an analysis parameter k, a group of k consecutive months is said to be highly profitable if the values of the stock prices are strictly increasing for those months. Given the stock prices of the company for n months and the analysis parameter k, find the number of highly profitable months  Example  Let the number of months be n = 8, the stock prices be stockPrices = [5, 3, 5, 7, 8] and the analysis parameter be k = 3. Following are the groups of k months in which the stock prices are strictly increasing: Hence the answer is 2.  Function Description  Complete the function countHighlyProfitableMonths in the editor below. countHighlyProfitableMonths has the following parameters:     int stockPrices[n]: the stock prices for n months.   ...
Click to Continue...

Largest Integer

PKJ
 Coding Problem Keys   Largest Integer    Problem Statement  An array of N integers is read from a file. The file name is stored in the variable fileName. Fill in the missing lines of code to print the largest of N integers.  Boundary Condition(s)  1 <= N <= 1000  Input File Format  The first line contains N. The second line contains N integers separated by space(s).  Output File Format The first line contains an integer.  Example Input/Output 1   Input  5 21 56 23 89 64  Output  89  Example Input/Output 2   Input  6 102 456 28 10 23 666  Output  666  Note:  Max Execution Time Limit: 5000 millisecs  ...
Click to Continue...

Desktop Products

PKJ
 Coding Problem Keys   Desktop Products   Problem Statement  A company DigiComparts manufactures 52 types of unique products for laptop and desktop computers. It manufactures 10 types of laptop products and 42 types of desktop products. Each product manufactured by the company has a unique productID from a-z and and A-Z. The laptop products have productIDs (a, i, e, o, u, A, I, E, O, U) while the rest of the productIDs are assigned to the desktop products. The company manager wishes to find the sales data for the desktop products. Given a list of productIDs of the sales of the last N products, write an algorithm to help the manager find the productIDs of the desktop products.  Input Format  The first line of the input consists of an integer numOfProducts, representing the number of products to be considered in the sales data (N). The second line consists of N space-separated characters - productID 1 , productID 2 , ... , productID N  represen...
Click to Continue...

Words Starting with Upper Case

PKJ
 Coding Problem Keys    Words Starting with Upper Case    Problem Statement  The program must accept a string S containing multiple words as the input. The program must print the words starting with an upper case alphabet in S as the output. If there is no such word, the program must print -1 as the output.  Input Format  The first line contains N. The second line contains N integers separated by a space.  Output Format  The first line contains the integer value(s) based on the given conditions.  Boundary Condition(s)  3 <= Length of S < 100  Example Input/Output 1   Input  How are you? I am FINE   Output  How I FINE  Explanation  The words starting with an upper case alphabets are How , I and FINE . Hence the output is How I FINE.  Example Input/Output 2   Input  Cricket Match 1: India vs Pakistan   Output  Cricket Match India Pakistan  Example...
Click to Continue...

Find Maxima/Minima

PKJ
 Coding Problem Keys   Find Maxima/Minima   Problem Statement  Implement the following function: def MaximaOrMinima(a, b, c): Quadratic equation: A quadratic equation is any equation having the form, ax ² + bx + c, where 'a' cannot be zero. The function accepts coefficients of a quadratic equation, 'a', 'b' and 'c' as its argument. Implement the function to find the maximum or minimum value of quadratic equation by substituting integer values x, where -100 <= x <= 100. Return the values as follow: If a > 0, return the minimum value of the equation. If a < 0, return the maximum value of the equation. Assumption: a is not equal to zero. Note: Computed value lies within integer range.  Example 1   Input  a: 1 b: 2 c: 1  Output  0  Explanation  Since, (a > 0) output is the minimum value which is at x = -1, output = 1 * (-1) ²  + 2 * (-1) + 1 = 0. The custom input format for the above case: 1 2 1 (Th...
Click to Continue...