#include	<stdio.h>
#include	<string.h>
#include	<stdlib.h>

char		*infAdd(int det, int cur, int stock, char **av)
{
  char		*result;
  int		sign[2];
  int		curs[2];
  int		terms[2];

  sign[0] = (av[1][0] == '-') ? -1 : 1;
  sign[1] = (av[2][0] == '-') ? -1 : 1;
  curs[0] = strlen(av[1]);
  curs[1] = strlen(av[2]);
  result = malloc((curs[0] > curs[1] ? curs[0] : curs[1]) + 2);
  result[(curs[0] > curs[1] ? curs[0] : curs[1]) + 1] = '\0';
  memset(result, '0', (curs[0] > curs[1] ? curs[0] : curs[1]) + 1);
  det = 0;
  while (((cur = 0) == 1) || curs[0] >= 0 || curs[1] >= 0 || det > 0)
    {
      terms[0] = --curs[0] < 0 || av[1][curs[0]] == '-' ?
	0 : sign[0] * (av[1][curs[0]] - 48);
      terms[1] = --curs[1] < 0 || av[2][curs[1]] == '-' ?
	0 : sign[1] * (av[2][curs[1]] - 48);
      stock = terms[0] + terms[1] + det; /* Manage negative here */
      cur = (stock < 0 ? -stock : stock) % 10;
      det = (cur < 0) ? -1 : (stock / 10);
      result[(curs[0] > curs[1] ? curs[0] : curs[1]) + 1] = cur + 48;
    }
  return (result);
}

int		main(int ac, char **av)
{
  char		*result;

  if (ac != 3)
    return (fprintf(stderr, "Use: %s [terms_one] [terms_two]\n", av[0]));
  result = infAdd(0, 0, 0, av);
  printf("%s\n", result);
  free(result);
  return (0);
}