Techgig – Virus Outbreak – Solution – Java
Virus Outbreak (100 Marks)
In the Martian land faraway, a new virus has evolved and is attacking the individuals at a fast pace. The scientists have figured out the virus composition, V. The big task is to identify the people who are infected. The sample of N people is taken to check if they are POSITIVE or NEGATIVE. A report is generated which provides the current blood composition B of the person.
POSITIVE or NEGATIVE ?
If the blood composition of the person is a subsequence of the virus composition V, then the person is identified as POSITIVE otherwise NEGATIVE.
Example:
Virus Composition, V = coronavirus
Blood Composition of the person, B = ravus
The person in question is POSITIVE as B is the subsequence of the V.
The scientists are busy with their research for medicine and request you to build a program which can quickly figure out if the person is POSITIVE or NEGATIVE. They will provide you with the virus composition V and all the people’s current blood composition. Can you help them?
Note: The virus and blood compositions are lowercase alphabet strings.
Input Format
The first line of the input consists of the virus composition, V
The second line of the input consists of the number of people, N
Next N lines each consist of the blood composition of the ith person
Constraints
1<= N <=10
1<= |B|<= |V|<= 10^5
Output Format
For each person, print POSITIVE or NEGATIVE in a separate line
Sample TestCase 1
Input
Coronavirus
3
abcde
crnas
onarous
Output
NEGATIVE
POSITIVE
NEGATIVE
Time Limit(X):
0.50 sec(s) for each input.
Memory Limit:
512 MB
/*
* Enter your code here. Read input from STDIN. Print your output to STDOUT.
* Your class should be named CandidateCode.
*/
import java.io.*;
import java.util.*;
public class CandidateCode {
public static void main(String args[] ) throws Exception {
Scanner scanner = new Scanner(System.in);
String virusComposition = scanner.next();
int sampleCount = scanner.nextInt();
int count = 0;
while(count < sampleCount){
count++;
String sample = scanner.next();
Boolean result = isPositive(sample,virusComposition);
if(result)
System.out.println("POSITIVE");
else
System.out.println("NEGATIVE");
}
scanner.close();
}
public static Boolean isPositive(String str1,String str2){
int m = str1.length();
int n = str2.length();
int i = 0;
int j = 0;
while (j < m && i < n){
if (str1.charAt(j) == str2.charAt(i)){
j++;
}
i++;
}
return (j == m);
}
}
