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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. 		String s = sc.next();
  15.  
  16. 		int n = s.length();
  17.  
  18. 		int[][] dp = new int[n][n];
  19.  
  20. 		int lps = 1;
  21. 		for(int i = 0; i < n; i++){
  22. 			dp[i][i] = 1;
  23. 		}
  24.  
  25. 		for(int i = 0; i < n-1; i++){
  26. 			if(s.charAt(i) == s.charAt(i+1)){
  27. 				dp[i][i+1] = 2;
  28. 				//lps = Math.max(lps, dp[i][i+1]);
  29. 			}else{
  30. 				dp[i][i+1] = 1;
  31. 				//lps = Math.max(lps, dp[i][i+1]);
  32. 			}
  33. 		}
  34.  
  35. 		for(int len = 3; len <= n; len++){
  36. 			for(int i = 0; i <= n - len; i++){
  37. 				int j = i + len - 1;
  38. 				if(s.charAt(i) != s.charAt(j)){
  39. 					dp[i][j] = Math.max(dp[i][j-1], dp[i+1][j]);
  40. 				}else{
  41. 					dp[i][j] = Math.max(2 + dp[i+1][j-1], Math.max(dp[i+1][j],dp[i+1][j-1]));
  42. 				} 
  43. 			}
  44. 		}
  45.  
  46. 		System.out.print(dp[0][n-1]);
  47. 	}
  48. }
Success #stdin #stdout 0.12s 56596KB
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https://ideone.com/K0hby6
language:
Java (HotSpot 12)
created:
4 hours ago
visibility:
public

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