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  1. import java.math.BigInteger;
  2. import java.util.Scanner;
  3.  
  4.  
  5. class Ideone {
  6.  
  7. 	public static void main(String[] args) {
  8.  
  9. 		int len = 0;
  10. 		String ausi;
  11. 		Scanner ip = new Scanner(System.in);
  12. 		ausi = ip.nextLine();
  13. 		len = ausi.length();
  14. 		char[] b = new char[len/2];
  15. 		char[]  a = new char[len/2];
  16.  
  17. 	System.out.println(ausi +" " + len);		/**output the big int just read from stdin + its lenght**/
  18. 		ausi.getChars(0, len/2, a, 0);		/** taking first half of the input big no. **/
  19. 		if(len % 2 == 0) 
  20. 			{
  21. 			ausi.getChars(len/2, len-1, a, 0); 
  22. 			//m
  23. 			}
  24. 		else 
  25. 			{
  26. 			ausi.getChars(len/2+1, len, b, 0);
  27. 			//m = ausi.charAt(len/2);
  28. 			}
  29. 			String as  = String.valueOf(a);		/**in order to convert 'a' to a BIGINT it must b converted to a string first **/ 
  30. 		String bs = String.valueOf(b);			/** so 'as' and 'bs' are the string representations of 'a' and 'b' resp **/
  31.  
  32. 		 BigInteger A = new BigInteger(as);		/**this part throws exception says as should be of form "decimal string"**/
  33. 		 BigInteger B = new BigInteger(bs);		/**so whats the diff between a string and a decimal string ??**/
  34.  
  35. 		if(A.compareTo(B) == 1) // A > B
  36. 		System.out.println(as+"%"+bs);
  37.  
  38. 		ip.close();
  39.     }
  40. }
Runtime error #stdin #stdout #stderr 0.1s 380800KB
comments ()
stdin 
9876543210
stdout 
9876543210 10
stderr 
Exception in thread "main" java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:481)
	at java.math.BigInteger.<init>(BigInteger.java:338)
	at java.math.BigInteger.<init>(BigInteger.java:476)
	at Ideone.main(Main.java:33)
https://ideone.com/9N3a9p
language:
Java (12.0.1)
created:
10 years ago
visibility:
public

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