ranQ = []

count = 0

with open("input.txt") as file:
    input = file.read().strip()

ranges = input.split(",")

for ran in ranges:
    start, end = ran.split("-")
    if len(start) == len(end):
        if len(start) % 2 == 0:
            ranQ.append((int(start), int(end)))
    else:
        if len(start) % 2 == 0:
            ranQ.append((int(start), 10**len(start)- 1))
        elif len(end) % 2 == 0:
            ranQ.append((10**len(start), int(end)))
            

for start, end in ranQ:
    done = []
    print(f"Processing range: {start} to {end}")
    start_prefix = str(start)[:len(str(start))//2]
    end_prefix = str(end)[:len(str(end))//2]
    for prefix in range(int(start_prefix), int(end_prefix) + 1):
        candidate = int(str(prefix) * 2)
        if start <= candidate <= end and candidate not in done:
            print(f"Adding: {candidate}")
            count += int(candidate)
            done.append(candidate)
        
print(count)