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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.io.*;
  5.  
  6. /* DO NOT CHANGE ANYTHING ABOVE THIS LINE */
  7. /* You may add any imports here, if you wish, but only from the 
  8.    standard library */
  9.  
  10. /* Do not add a namespace declaration */
  11. public class Main {
  12.     public static Map<String,Integer> processData(ArrayList<String> array) {
  13. 	Map<String,Integer> retVal = new HashMap<String,Integer>(); //Result Map
  14. 	Map<String,Integer> map = new HashMap<String,Integer>();   //Intermediate Map To Store Subjects and Marks
  15.         for(int i=0;i<array.size();++i)
  16. 		{
  17. 			String input = array.get(i);
  18. 			System.out.println(input);
  19. 			boolean flag1  = false, flag2 = false ;
  20. 			String id="" , subject="", marks="";
  21. 			for(int j=0;j<input.length();++j)    //Parsing The Input
  22. 			{
  23. 				if(flag2){
  24. 					marks= marks+input.charAt(j);
  25. 				continue;	
  26. 				}
  27. 				if(!flag1){
  28. 					if(input.charAt(j)=='|')
  29. 						flag1 = true;
  30. 					else
  31. 						id=id+input.charAt(j);
  32.  
  33. 				}
  34. 				else if(flag1){
  35. 						if(input.charAt(j)=='|')
  36. 						flag2 = true;
  37. 					else
  38. 						subject=subject+input.charAt(j);
  39. 				}
  40.  
  41.  
  42.  
  43. 			}
  44. 			int Id = Integer.parseInt(id);
  45. 			int Marks = Integer.parseInt(marks);
  46. 			if(map.get(subject)==null){
  47. 				map.put(subject,new Integer(Marks));
  48. 				retVal.put(subject,new Integer(id));
  49. 			}
  50. 			else{
  51. 				int m = map.get(subject);
  52. 				if(Marks>m){
  53. 				map.put(subject,new Integer(Marks));
  54. 				retVal.put(subject,new Integer(id));
  55. 				}
  56.  
  57. 			}
  58.  
  59. 		}	
  60.  
  61.        return retVal;
  62.     }
  63.  
  64.     public static void main (String[] args) {
  65.  
  66.         ArrayList<String> inputData = new ArrayList<String>();
  67.         String line;
  68.         try {
  69.             Scanner in = new Scanner(new BufferedReader(new FileReader("input.txt")));
  70.             while(in.hasNextLine())
  71.                 inputData.add(in.nextLine());
  72.             Map<String,Integer> retVal = processData(inputData);
  73.             PrintWriter output = new PrintWriter(new BufferedWriter(new FileWriter("output.txt")));
  74.             for(Map.Entry<String,Integer> e: retVal.entrySet())
  75.                 output.println(e.getKey() + ": " + e.getValue());
  76.             output.close();
  77.         } catch (IOException e) {
  78.             System.out.println("IO error in input.txt or output.txt");
  79.         }
  80.  
  81.  
  82.     }
  83. }
Success #stdin #stdout 0.1s 48536KB
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stdin
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Standard input is empty
stdout
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IO error in input.txt or output.txt
https://ideone.com/vcEks3
language:
Java (HotSpot 12)
created:
1 year ago
visibility:
public

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