Problem 13. Large sum

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
import java.util.Stack;

public class euler13 {
    public static void main(String[]args) {
        String[] s = new String[100];
        int l = 0;
       	File f = new File("13.txt");
       	try {
            Scanner in = new Scanner(f);
            while (in.hasNextLine()) {
            	String line = in.nextLine();
            	s[l++] = line;
            }
            in.close();
        }
        catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        int digit;
        int carry = 0;
        Stack st = new Stack();
        for (int j = 49; j >= 0; j--) {
            int sum = 0;
            for (int i = 0; i < 100; i++) {
               	sum += Character.getNumericValue(s[i].charAt(j));
            }
            sum += carry;
            digit = sum % 10;
            carry = sum / 10;
            st.push(new Integer(digit));
        }
        st.push(carry);
        int count = 0;
        while (count++ < 10) {
            System.out.println(st.pop());
        }
    }
}