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  1. import java.util.Scanner;
  2.  
  3. public class Main {
  4. 	public static int[] F = new int[51];
  5. 	public static int numberOfWays(int n){
  6. 		F[0] = 0;
  7. 		F[1] = 1;
  8. 		F[2] = 1;
  9. 		F[3] = 2;
  10. 		F[4] = 3;
  11. 	    if(F[n] > 0) {
  12.     		return F[n];
  13. 		} else {
  14.     		F[n] = numberOfWays(n-2) + numberOfWays(n-3) + numberOfWays(n-4);
  15. 		}
  16. 		return F[n];
  17. 	}
  18. 	public static void main (String[] args){
  19. 	    Scanner sc = new Scanner(System.in);
  20.         int n = sc.nextInt();
  21. 	    System.out.println(numberOfWays(n));
  22. 	}
  23. }
  24.  
Success #stdin #stdout 0.1s 35376KB
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https://ideone.com/SutVZt
8536/2
language:
Java (HotSpot 12)
created:
3 years ago
visibility:
secret

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