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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6.     static final String in = "aabbccddeeffgghhiijjkaaaabbbbccccddddeeeeffffggggh";
  7.  
  8.     public static void main (String[] args) throws java.lang.Exception
  9.     {
  10.         System.out.print(firstLonelyChar(in));
  11. 	}
  12.  
  13.     static public String firstLonelyChar(String input)
  14.     {
  15.         while(input.length() > 0)
  16.         {
  17.             int curLength = input.length();
  18.             String first = String.valueOf(input.charAt(0));
  19.             input = input.replaceAll(first, "");
  20.             if(input.length() == curLength - 1)
  21.                 return first;
  22.         }
  23.         return null;
  24.     }	
  25. }
Success #stdin #stdout 0.06s 380224KB
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https://ideone.com/qljw7i
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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