def part1(input_str):
    lines = input_str.strip().split("\n")
    output = 0

    for bank in lines:
        best = 0
        length = len(bank)

        for i in range(length):
            tens = int(bank[i])
            for j in range(i + 1, length):
                ones = int(bank[j])
                value = tens * 10 + ones
                if value > best:
                    best = value

        output += best

    return output


def part2(input_str, k = 12):
    lines = input_str.strip().split("\n")
    total = 0

    for bank in lines:
        bank = bank.strip()
        n = len(bank)
        start = 0
        chosen = []

        for picked in range(k):
            last = n - (k - picked)
            best_char = bank[start]
            best_idx = start

            for i in range(start + 1, last + 1):
                if bank[i] > best_char:
                    best_char = bank[i]
                    best_idx = i

                    if best_char == '9':
                        break

            chosen.append(best_char)
            start = best_idx + 1

        total += int("".join(chosen))

    return total



with open("input.txt") as f:
    data = f.read()

print("Part1:", part1(data))
print("Part2:", part2(data, 12))