UVA - 541 - Error Correction

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


public class Main {


    public static void main(String[] args) throws IOException {
       BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
       StringBuffer sb=new StringBuffer("");
       String m="";
       while(true){
           int n=Integer.parseInt(br.readLine());
           if(n==0) {
               break;
           }
           int[] cols=new int[n];
           int[] rows=new int[n];
           for(int i=0;i<n;i++){
              String[] str=br.readLine().split(" ");
              for(int j=0;j<n;j++){
                  if("1".equals(str[j])){
                      cols[j]++;
                      rows[i]++;
                  }
              }
           }
           int countRIm=0,tempR=0;
           int countCIm=0,tempC=0;
           for(int i=0;i<n;i++){
               if(cols[i]%2==1) {
                   countCIm++;
                   tempC=i+1;
               }
               if(rows[i]%2==1) {
                   countRIm++;
                   tempR=i+1;
               }
           }
          
           if(countCIm>1 ||countRIm>1){
               sb.append("Corrupt\n");
           }else if(countCIm==1 &&countRIm==0){
               sb.append("Corrupt\n");
           }else if(countCIm==0 &&countRIm==1){
               sb.append("Corrupt\n");
           }
           else if(countCIm==1 &&countRIm==1){
               sb.append("Change bit (").append(tempR).append(",").append(tempC).append(")\n");
           }else{
               sb.append("OK\n");
           }
       }
       System.out.print(sb);
    }
}