with open(r'day3/input.txt', 'r') as input:
    lines = input.read().split('\n')[:-1]


sum = 0

for line in lines:
    # Transforming line to array of digits
    numbers = list(map(lambda x: int(x), list(line)))
    besti = -1  # -1 to give 0 to the start of the allowed ranges
    linejolt = ''  # value buffer
    for i in range(12):
        # Allowed is the list of elements we can choose from while not compromising future choices
        # 100 magic number to prevent 11-i from becoming negative, hence excluding last number if list has one single element remaining
        allowed = numbers[besti+1:-(11-i) if 11-i > 0 else 100]
        best = max(allowed)
        # slicing here to prevent chosing index from a previous allowed range
        besti = numbers[besti+1:].index(best)+besti+1
        linejolt += str(best)
    sum += int(linejolt)


print(sum)