Poj Solution 1159

http://poj.org/problem?id=1159


import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {

 public static void main(String[] args) throws Exception{
    BufferedReader in = new BufferedReader(new InputStreamReader (System.in));
    int total = Integer.parseInt(in.readLine());
    String string = in.readLine();
        System.out.println(total-LCS(string,new StringBuffer(string).reverse().toString()));
}

//����}��string��lcs�ij���
public static int LCS(String str1,String str2){
    short length1 = (short)str1.length();
    short length2 = (short)str2.length();
    short[][]result = new short [length1+1][length2+1];
    for(int i=0;i< length1;i++){
        result[i][0] = 0;
    }
    for(int i=0;i< length2;i++){
        result[0][i] = 0;
    }
    for(int i=1;i<=length1;i++){
      for(int j=1;j<=length2;j++){
        if(str1.charAt(i-1)==str2.charAt(j-1))
         result[i][j] = (short)(result[i-1][j-1]+1);
        else
         result[i][j] = result[i-1][j]>result[i][j-1]?result[i-1][j]:result[i][j-1];
        }
    }
    return result[length1][length2];
 }
    

}