Poj Solution 1080

http://poj.org/problem?id=1080

//* @author popop0p0popo
import java.util.*;
import java.io.*;

public class Main{
 public static int[][] chart;
 public static void main(String[] args){
  init();
  Scanner in=new Scanner(new BufferedReader(new InputStreamReader(System.in)));
  int p=in.nextInt();
  for (int k=0;k< p ;k++ ){
   int m=in.nextInt();
   String a=in.next();
   int n=in.nextInt();
   String b=in.next();
   int[][] c=new int[m+1][n+1];
   for (int i=0;i<=m ;i++ ){
    for (int j=0;j<=n ;j++ ){
     if (i==0&&j==0){
      c[i][j]=0;
     }
     else if(i==0){
      c[i][j]=c[i][j-1]+getValue(b.charAt(j-1),'-');
     }
     else if (j==0){
      c[i][j]=c[i-1][j]+getValue(a.charAt(i-1),'-');
     }
     else{
      int x=getValue(a.charAt(i-1),'-');
      int y=getValue(b.charAt(j-1),'-');
      int z=getValue(a.charAt(i-1),b.charAt(j-1));
      c[i][j]=max(c[i-1][j]+x,c[i][j-1]+y,c[i-1][j-1]+z);
     }
    }
  }
   System.out.println(c[m][n]);
  }
}

    public static void init(){
        chart=new int[5][5];
        chart[0][0]=5;
        chart[0][1]=-1;
        chart[0][2]=-2;
        chart[0][3]=-1;
        chart[0][4]=-3;
        chart[1][0]=-1;
        chart[1][1]=5;
        chart[1][2]=-3;
        chart[1][3]=-2;
        chart[1][4]=-4;
        chart[2][0]=-2;
        chart[2][1]=-3;
        chart[2][2]=5;
        chart[2][3]=-2;
        chart[2][4]=-2;
        chart[3][0]=-1;
        chart[3][1]=-2;
        chart[3][2]=-2;
        chart[3][3]=5;
        chart[3][4]=-1;
        chart[4][0]=-3;
        chart[4][1]=-4;
        chart[4][2]=-2;
        chart[4][3]=-1;
    }

    public static int getValue(char a,char b){
        int ai=getIndex(a);
        int bi=getIndex(b);
        return chart[ai][bi];
    }

    public static int getIndex(char a){
        switch (a){
            case 'A':
                return 0;
            case 'C':
                return 1;
            case 'G':
                return 2;
            case 'T':
                return 3;
            case '-':
                return 4;
            default :
                return -1;
        }
    }

    public static int max(int a,int b,int c){
        int m=0;
        if (a>=b){
            if (a>=c){
                m=a;
            }
            else{
                m=c;
            }
        }
        else{
            if (b>=c){
                m=b;
            }
            else{
                m=c;
            }
        }
        return m;
    }
}