import chn.util.*;
public class UPCChecker
{
    private long checkdigit;
    private long[] numArray = new long[11];
    public long getDigit(long code)
    {
        
        
        for(int i=10; i>=0; i--)
        {
            numArray[i] = (long)(code%10);
            code = code/10;
          }
          
        long sum = numArray[0] + numArray[2] + numArray[4] + numArray[6] + numArray[8] + numArray[10];
        sum *= 3;
        long sum2 = numArray[1] + numArray[3] + numArray[5] + numArray[7] + numArray[9];
        sum += sum2; 
        
        checkdigit = sum%10;
		if(checkdigit != 0)
		  checkdigit = 10 - checkdigit;
		
		return checkdigit;
		
		
	}
	
	public boolean isValid()
	{
	    boolean valid;
        if (checkdigit == numArray[10])
        {
            valid = true;
        }
        else
        {
            valid = false;
        }
    return valid;   
    }
	    
}