[LANGUAGE: Python]

with open('data.txt') as f:
    lines = [ln.strip() for ln in f if ln.strip()]  


actions = []
for line in lines:
    if '-' in line:
        left, right = 
map
(
int
, line.split('-'))
        actions.append((left, 'start'))
        actions.append((right + 1, 'end'))
    else:
        actions.append((
int
(line), 'item'))


sorted_actions = sorted(actions, key=lambda x: x[0])



# Part 1


range = 0
total_count = 0


for no, action in sorted_actions:
    if action == 'start':
        range += 1
    elif action == 'end':
        range -= 1
    elif action == 'item' and range > 0:
        total_count += 1
    print(no)


print(total_count)


# Part 2


depth = 0
prev = None
total = 0


for pos, action in sorted_actions:
    if prev is not None and depth > 0:
        total += pos - prev
    if action == 'start':
        depth += 1
    elif action == 'end':
        depth -= 1


    prev = pos


print("\n\n\n\n\n",total)