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void is_reachable(int a, int b, int time_limit)
{
  int result;
  int max_distance;
  int distance;

  if (a <= b) {
    distance = (b - a);
  } else {
    distance = (a - b);
  };
  max_distance = (time_limit * 10);
  if (distance <= max_distance) {
    result = 1;
  } else {
    result = 0;
  };

}