Avoid Contact CodeChef Solution

Problem – Avoid Contact CodeChef Solution

A hostel has N rooms in a straight line. It has to accommodate X people. Unfortunately, out of these X people, Y of them are infected with chickenpox. Due to safety norms, the following precaution must be taken:

• No person should occupy a room directly adjacent to a room occupied by a chickenpox-infected person. In particular, two chickenpox-infected people cannot occupy adjacent rooms.

For example, if room 4 has a chickenpox-infected person, then nobody should occupy rooms 3 and 5. Similarly, if room 1 has a chickenpox-infected person then nobody should occupy room 2.

What’s the minimum value of N for which all the people can be accommodated in the hostel, following the above condition?

Input Format

• The first line of input contains a single integer T — the number of test cases. The description of T test cases follows.
• The first and only line of each test case contains two integers X and Y — the total number of people and the number of chickenpox-infected people.

Output Format

For each test case, output on a new line a single integer — the minimum value of N for which all the people can be accommodated in the hostel.

Constraints

• 1≤T≤200
• 1≤X≤1000
• 0≤Y≤X

Sample 1:

Input:
3
4 0
5 3
3 3
Output:
4
8
5

Explanation:

Note: Below, C represents a room occupied by a chickenpox-infected person, N represents a room occupied by an uninfected person, and __ represents an empty room.

Test case 1: One of the possible ways to accommodate the people in 4 rooms is:

N N N N

Test case 2: One of the possible ways to accommodate the people in 8 rooms is:

C __ C __ N N __ C

Test case 3: One of the possible ways to accommodate the people in 5 rooms is:

C __ C __ C

Avoid Contact CodeChef Solution in Pyth 3

# cook your dish here
t=int(input())
for i in range(t):
    x,y=map(int,input().split())
    if x==y:
        print((x-y)+(y*2)-1)
    elif x>y:
        print((x-y)+(y*2))

Avoid Contact CodeChef Solution in C++17

#include <iostream>
using namespace std;

int main() {
	// your code goes here
	int t,x,y;
	cin>>t;
	while(t--)
	{
	  cin>>x>>y;
	  if(x==y)
	  cout<<x+x-1<<endl;
	  else if(x!=y)
	  cout<<x+y<<endl;
	}
	return 0;
}

Avoid Contact CodeChef Solution in Java

/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	// your code goes here
			 Scanner sc=new Scanner(System.in);
		 int n=sc.nextInt();
		 for(int i=0;i<n;i++){
		     int a=sc.nextInt();
		     int b=sc.nextInt();
		     if(b==0){
		         System.out.println(a);
		         
		     }
		     else if(a==b){
		         System.out.println((b*2-1)+(a-b));
		     }
		     else{
		         System.out.println((b*2)+(a-b));
		     }
		 }
	}
}

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