Algorithms - Warmup - Angry Professor

Angry Professor

The following is the solution to Hacker Rank problem Angry Professor using Java.  For solutions to other Hacker Rank Problem visit my page HackerRank, alternatively try searching for the problem in my blog.

It is a easy problem, the solution followed is simple. We know that if number of students in class is not equal to K we cancel the class else the class is not cancelled.

Score: 20/20

/**  *  */ import java.util.Scanner; /**  * @author Arun.G  *  */ public class Solution {        /**         * @param args         */        public static void main(String[] args) {               // TODO Auto-generated method stub                Scanner sc = new Scanner(System.in);                //no of test cases                int T = Integer.parseInt(sc.nextLine());                             for(int count=0;count<T;count++)                    {                        String[] constraints = sc.nextLine().split(" ");                        //n and k                    int N =Integer.parseInt(constraints[0]);                    int K =Integer.parseInt(constraints[1]);                    //count no of students inside the class                    int noOfStuds =0;                    //all the students times are stored in string array                    String[] students = sc.nextLine().split(" ");                                       for(int i=0;i<N;i++)                        {                        int stud = Integer.parseInt(students[i]);                        // if it is negative or zero the student arrived before the class                        if(stud<=0)                            noOfStuds++;                        //k students are present in the class so no need to cancel the class, so NO                        if(noOfStuds>=K)                            {                            System.out.println("NO");                            break;                        }                    }                    // if K students are not there in the class the class is cancelled so YES                    if(noOfStuds<K)                        System.out.println("YES");                }                               sc.close();                 } }