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  1. class X{
  2. 	public static void main(String[] args){
  3. 		boolean[] lockers = new boolean[100];
  4. 		int num = 0;
  5.  
  6. 		for(int i = 0;i < 100;i++){
  7. 			lockers[i] = false;
  8. 		}
  9.  
  10.  
  11. 		for(int i = 0;i < 100;i++){
  12. 			for(int j = 1; (i + 1) * j - 1 < 100;j++){
  13. 				lockers[(i + 1) * j - 1] = !lockers[(i + 1) * j - 1];
  14. 			}
  15. 		}
  16.  
  17. 		for(int i = 0;i < 100;i++){
  18. 			if(lockers[i]){
  19. 				num = num + 1;				
  20. 			}
  21. 		}
  22. 		System.out.println(num);
  23.  
  24. 	}
  25. }
Success #stdin #stdout 0.04s 213312KB
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10
https://ideone.com/0K1UW
language:
Java (HotSpot 12)
created:
13 years ago
visibility:
secret

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