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  1. import java.util.Scanner;
  2. public class Main {
  3. 	static int multiplication(int x) {
  4. 		    int mul = 1;
  5. 		    while(x != 0) {
  6. 		        mul *= x % 10;
  7. 		        x /= 10;
  8. 		    }
  9. 		    return mul;
  10. 	}
  11. 	public static void main (String[] args) {
  12. 		Scanner scanner = new Scanner(System.in);
  13. 		int n = scanner.nextInt();
  14. 		int maxmul = multiplication(n);
  15. 		int copy = n;
  16. 		int i = 10;
  17. 		while(n!= 0) {
  18. 			int temporary_number = (copy / (i / 10)) % 10;
  19. 			int left = copy / i;
  20. 			int right = copy % (i / 10);
  21. 			if(temporary_number != 9) {
  22. 				temporary_number = 9;
  23. 				copy = ((left - 1) * 10 + temporary_number) * (i / 10) + right;
  24. 			}
  25. 			n /= 10;
  26. 			i *= 10;
  27. 			int mul = multiplication(copy);
  28. 			if(maxmul < mul) maxmul = mul;
  29. 		}
  30. 		System.out.println(maxmul);
  31. 	}
  32.  
  33. }
Success #stdin #stdout 0.1s 35480KB
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https://ideone.com/GzHfjF
language:
Java (12.0.1)
created:
4 years ago
visibility:
secret

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