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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Codechef
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		// your code goes here
  10. 		Scanner sc=new Scanner(System.in);
  11. 		int t=sc.nextInt();
  12. 		while(t-->0){
  13. 		    int n=sc.nextInt();
  14. 		    int[]a=new int[n+1];
  15. 		    for(int i=1;i<=n;i++)a[i]=sc.nextInt();
  16. 		    int[][]dp=new int[n+1][3];
  17. 		    if(a[1]%2==0){
  18. 		        dp[1][2]=1; //even
  19. 		    }
  20. 		    if(a[1]%2!=0){
  21. 		        dp[1][1]=1; //odd
  22. 		    }
  23. 		    for(int i=2;i<=n;i++){
  24. 		        if(a[i]%2==0){
  25. 		            dp[i][2]=dp[i-1][2]+dp[i-2][2];
  26. 		            dp[i][1]=dp[i-1][1]+dp[i-2][1];
  27. 		        }else{
  28. 		            dp[i][2]=dp[i-1][1]+dp[i-2][1];
  29. 		            dp[i][1]=dp[i-1][2]+dp[i-2][2];
  30. 		        }
  31. 		    }
  32. 		    System.out.println("Number of odd sum journey : "+dp[n][1]);
  33. 		    System.out.println("Number of even sum journey : "+dp[n][2]);
  34. 		    System.out.println();
  35. 		}
  36. 		sc.close();
  37.  
  38. 	}
  39. }
  40.  
Success #stdin #stdout 0.14s 56952KB
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stdin
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stdout
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Number of odd sum journey : 3
Number of even sum journey : 0

Number of odd sum journey : 3
Number of even sum journey : 2
https://ideone.com/s9XEiC
language:
Java (HotSpot 12)
created:
18 hours ago
visibility:
public

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