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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 in=new Scanner(System.in);
  14.  
  15. 		String a = in.nextLine();
  16. 		String b = in.nextLine();
  17.  
  18. 		int [][] dp=new int [a.length()+1][b.length()+1];
  19.  
  20. 		for(int i=a.length()-1;i>=0;i--){
  21. 		    for(int j = b.length() - 1; j >= 0; j--){
  22. 		        if(a.charAt(i)>b.charAt(j)){
  23. 		            int len = a.length()-i-1;
  24. 		            dp[i][j]=dp[i+1][j]+ (int)(Math.pow(2,len));
  25. 		        }else if(a.charAt(i)<b.charAt(j)){
  26. 		            dp[i][j]=dp[i+1][j];
  27. 		        }else if(a.charAt(i)==b.charAt(j)){
  28. 		            dp[i][j]=dp[i+1][j] + dp[i+1][j+1];
  29. 		        }
  30. 		    }
  31. 		}
  32. 		System.out.println(dp[0][0]);
  33.  
  34. 		in.close();
  35. 	}
  36. }
Success #stdin #stdout 0.12s 54640KB
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https://ideone.com/wrWoYh
language:
Java (HotSpot 12)
created:
12 hours ago
visibility:
public

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