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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. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		String[] expr = new String[]{"67", "+", "45", "-", "12", "*", "5", "/", "78"};
  13. 		int current = 0;
  14. 		StringBuilder postfix = new StringBuilder();
  15.  
  16. 		// handle first three
  17. 		postfix.append(expr[current]).append(" ");
  18. 		postfix.append(expr[current+2]).append(" ");
  19. 		postfix.append(expr[current+1]).append(" ");
  20. 		current += 3;
  21.  
  22. 		// handle rest
  23. 		while( current <= expr.length-2 ){
  24. 			postfix.append(expr[current+1]).append(" ");
  25. 			postfix.append(expr[current]).append(" ");
  26. 			current += 2;
  27. 		}
  28.  
  29. 		System.out.println(postfix.toString());
  30. 	}
  31. }
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin 
Standard input is empty
stdout 
67 45 + 12 - 5 * 78 /
https://ideone.com/zcdlEq
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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