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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class A
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		Scanner in = new Scanner(System.in);
  10. 		int n, m, minus = 1;
  11. 		n = in.nextInt();
  12. 		m = 1;
  13. 		for  (int a = 1; n> 0; a *= 10) {
  14. 		  for  (int b = a; b < a*10; b++) {
  15. 			if ((n - minus) < 0) {
  16. 			  System.out.print(0);
  17. 			  return;
  18. 			}
  19. 			if ((n - minus) == 0) {
  20. 				System.out.print(m);
  21. 			  return;
  22. 			}
  23. 			n-= minus;
  24. 			m++;
  25. 		  }
  26. 		  minus++;
  27. 		}
  28. 		in.close();
  29. 		return;
  30. 	}
  31. }
Success #stdin #stdout 0.06s 2184192KB
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https://ideone.com/7VY3jm
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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