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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. public class Main
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12.  
  13. 		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  14. 		int testCases = Integer.parseInt(br.readLine());
  15. 		for (int i=0;i<testCases;i++) {
  16. 			String str = br.readLine();
  17. 			StringBuilder str1 = new StringBuilder();
  18. 			for (int j=0;j<str.length();j++) {
  19. 				if(str.charAt(j)=='(') {
  20. 					continue;
  21. 				}else if(Character.isAlphabetic(str.charAt(j))) {
  22. 					System.out.print(str.charAt(j));
  23. 				}else if (str.charAt(j) == ')') {
  24. 					System.out.print(str1.charAt(str1.length()-1));
  25. 					str1.deleteCharAt(str1.length()-1);
  26. 				}else {
  27. 					str1.append(str.charAt(j));
  28. 				}
  29. 			}
  30. 			str1.reverse();
  31. 			System.out.println(str1);
  32. 		}
  33.  
  34. 	}
  35. }
Runtime error #stdin #stdout #stderr 0.1s 320576KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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Exception in thread "main" java.lang.NumberFormatException: null
	at java.lang.Integer.parseInt(Integer.java:542)
	at java.lang.Integer.parseInt(Integer.java:615)
	at Ideone.main(Main.java:14)
https://ideone.com/E9s5jd
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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