OJ Board

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[java]
import java.io.*;
import java.util.*;

class Main{
	static String ReadLn (int maxLg)  // utility function to read from stdin
	{
		byte lin[] = new byte [maxLg];
		int lg = 0, car = -1;
		String line = "";
		try
		{
        while (lg < maxLg)
		{
		     car = System.in.read();
		     if ((car < 0) || (car == '\n')) break;
		          lin [lg++] += car;
		     }
		}
		catch (IOException e)
		{
	    	return (null);
	    }
	    if ((car < 0) && (lg == 0)) return (null);  // eof
		     return (new String (lin, 0, lg));
    	}

	public static void main(String[] args)
	{
		Main myWork = new Main();  // create a dinamic instance
	    myWork.Begin();           // the true entry point
	}

	void Begin(){

		String input;
		StringTokenizer idata;
		long st1, st2, prenesi, stej, a, b;

		while((input = Main.ReadLn (255)) != null)
		{
			idata = new StringTokenizer (input);
	    	a = Integer.parseInt(idata.nextToken());
        	b = Integer.parseInt(idata.nextToken());
			prenesi = 0;
			stej = 0;
        	if((a == 0) && (b == 0)){
				break;
			}
        	while((a > 0) || (b > 0)){
				st1 = a%10;
				st2 = b%10;
				a = a/10;
				b = b/10;
				if(st1+st2+prenesi >= 10){
					prenesi = 1;
					stej = stej + 1;
				}
				else{
					prenesi = 0;
				}
			}
			if(stej > 0){
				System.out.println(stej+" carry operations.");
			}
			else{
        		System.out.println("No carry operations.");
			}
		}
	}
}
[/java]