For the "NOT ENOUGH SERVERS" problem on DMOJ.

Main.java

package pkg2011_s1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

/**
 *
 * @author Kevin Jiang
 */
public class Main {
    public static boolean[][] tests;
    /**
     * returns a boolean arr with 'O' being true
     * and 'X' being false.
     * @param str
     * @return 
     */
    public static boolean[] processLine(String str){
        boolean[] results = new boolean[str.length()];
        for (int i = 0; i < results.length; i++) {
            if(str.charAt(i) == 'O'){//accepted
                results[i] = true;
            }else{//'X', unaccepted
                results[i] = false;
            }
        }
        
        return results;
    }
    
    /**
     * finds to see if there is a false AT ALL in the arr
     * @param arr
     * @return 
     */
    public static boolean finalResult(boolean[] arr){
        
        
        for (int i = 0; i < arr.length; i++) {
            if(!arr[i]){
                return false;
            }
        }
        
        return true;
    }
    
    public static void doStuff(BufferedReader reader) throws IOException{
        StringTokenizer st  = new StringTokenizer(reader.readLine());
        
        int numTesters = Integer.parseInt(st.nextToken());
        int numCase = Integer.parseInt(st.nextToken());
        
        tests = new boolean[numTesters][numCase];
        
        for (int i = 0; i < numTesters; i++) {
            tests[i] = processLine(reader.readLine());
        }
        
        
        //make a FINAL, const array for the desired overall results
        boolean[] ref = new boolean[numTesters];
        for (int i = 0; i < numTesters; i++) {
            ref[i] = finalResult(tests[i]);
        }
        
        int numReqTest = 1;
        int[] reqTests;
        for (numReqTest = 1; numReqTest < numTesters; numReqTest++) {
            reqTests = findGood(numReqTest);
        }
        
    }
    
    private static int[] findGood(int numReqTest) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }
    
    
    /**
     * @param args the command line arguments
     * @throws java.io.IOException
     */
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        
        doStuff(reader);
        
        reader.close();
    }

    
    
}

Not yet finished.