[gcj] I got runtime errors for my solution but have no idea what is wrong with it.

[Anamika Mathur]

import java.util.*;

//codejam 2018 practice round Question C:Speed 2

class Horse{
    public static void main(String args[])
    {
    
        Scanner sc=new Scanner(System.in);
        int t=0;
         while(sc.hasNextInt()) {
           t=sc.nextInt();
           break;
        }
        
        double ans[]=new double[t];
        int q;
        for(q=0;q<t;q++){
            int d=0,nh=0;
            while(sc.hasNextInt()) {
           d=sc.nextInt();
             nh=sc.nextInt();
           break;
        }
            
            double max_time=0.0;
            for(int i=0;i<nh;i++){
                int td=sc.nextInt();
                int ts=sc.nextInt();
                int tt=(d-td)/ts;
                if(tt>max_time){max_time=tt;}               
                
            }
            
             double num_ans=d/max_time;
            ans[q]=(double)Math.round(num_ans*1000000)/1000000;
            
            
        }
        
          for(q=0;q<t;q++){
            int e=q+1;
        System.out.println("Case #"+e+": "+ans[q]);
        }
    }
}

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