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)))
    # Since the first digis is the most important, we can chose the best (careful to leave a single digit at the end to leave a second choice!)
    best1 = max(numbers[:-1])
    besti = numbers.index(best1)  # first occurence of best digit
    best2 = max(numbers[besti+1:])
    sum += best1*10+best2

print(sum)