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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][2];
  19. 		int odd=0;
  20. 		int even=1;
  21. 		if(arr[0]%2==0){
  22. 			dp[0][odd]=0;
  23. 			dp[0][even]=1;
  24. 		}else{
  25. 			dp[0][odd]=1;
  26. 			dp[0][even]=0;
  27. 		}
  28. 		if(arr[1]%2==0){
  29. 			dp[1][odd]=dp[0][odd];
  30. 			dp[1][even]=dp[0][even];
  31. 		}else{
  32. 			dp[1][odd]=dp[0][even];
  33. 			dp[1][even]=dp[0][odd];
  34. 		}
  35. 		for(int i=2;i<n;i++){
  36. 			if(arr[i]%2==0){
  37. 				dp[i][odd]=dp[i-1][odd]+dp[i-2][odd];
  38. 				dp[i][even]=dp[i-1][even]+dp[i-2][even];
  39. 			}else{
  40. 				dp[i][odd]=dp[i-1][even]+dp[i-2][even];
  41. 				dp[i][even]=dp[i-1][odd]+dp[i-2][odd];
  42. 			}
  43. 		}
  44. 		System.out.println("Odd sum journies: "+dp[n-1][odd]);
  45. 		System.out.println("Even sum journies: "+dp[n-1][even]);
  46. 	}
  47. }
Success #stdin #stdout 0.12s 58856KB
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stdin
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2 3 5 8 10
stdout
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Odd sum journies: 3
Even sum journies: 2
https://ideone.com/xHmiFs
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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