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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. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc = new Scanner(System.in);
  14. 		int n=sc.nextInt();
  15. 		int arr[]=new int[n];
  16. 		for(int i=0;i<n;i++) arr[i]=sc.nextInt();
  17.  
  18. 		int dp[][]=new int[n+1][2];
  19. 		int odd=0;
  20. 		int even=1;
  21. 		if(arr[0]%2==0)dp[1][even]=1;
  22. 		else dp[1][odd]=1;
  23.  
  24. 		for(int i=2;i<=n;i++){
  25. 			if(arr[i-1]%2==0){
  26. 				dp[i][odd]=dp[i-1][odd]+dp[i-2][odd];
  27. 				dp[i][even]=dp[i-1][even]+dp[i-2][even];
  28. 			}else{
  29. 				dp[i][odd]=dp[i-1][even]+dp[i-2][even];
  30. 				dp[i][even]=dp[i-1][odd]+dp[i-2][odd];
  31. 			}
  32. 		}
  33. 		System.out.println("Odd sum journies: "+dp[n-1][odd]);
  34. 		System.out.println("Even sum journies: "+dp[n-1][even]);
  35. 	}
  36. }
Success #stdin #stdout 0.13s 58860KB
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stdin
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2 3 5 8 10
stdout
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Odd sum journies: 2
Even sum journies: 1
https://ideone.com/Nh8MWJ
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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