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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. class Ideone
  8. {
  9. public static void main (String[] args) throws java.lang.Exception
  10. {
  11. String s = bf.readLine();
  12. int n = Integer.parseInt(s);
  13.  
  14. for(int i = 0 ; i < n ; i++) {
  15. for(int j = i ; j < n ; j++) {
  16. bw.write("*");
  17. }
  18. bw.write("\n");
  19. }
  20. bw.flush();
  21. }
  22. }
Runtime error #stdin #stdout #stderr 0.08s 32724KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
Exception in thread "main" java.lang.NumberFormatException: null
	at java.base/java.lang.Integer.parseInt(Integer.java:620)
	at java.base/java.lang.Integer.parseInt(Integer.java:776)
	at Ideone.main(Main.java:14)