Poj Solution 2840

http://poj.org/problem?id=2840

 import java.util.*;  
   
 public class Main {  
     public static void main(String[] args) {  
         Scanner cin = new Scanner(System.in);  
           
         int num = Integer.valueOf(cin.nextLine()).intValue();  
         for(int i = 0; i < num; i++)  
         {  
             String[] str = cin.nextLine().split(":");  
             int hour = Integer.valueOf(str[0]).intValue();  
             int minute = Integer.valueOf(str[1]).intValue();  
               
             if(minute != 0)  
                 System.out.println("0");  
             else  
             {  
                 if(hour >= 0 && hour <= 12)  
                     System.out.println(hour+12);  
                 else  
                     System.out.println(hour-12);  
             }  
         }  
     }  
   }