aoc 2023 day 1 part 1

total = 0

with open("day1.txt") as f: # open the file, reading it
    for line in f.readlines(): # loop over each line in the file
        numbers = list(filter(str.isdigit, line)) # create a list of just the numbers in each line
        calibration = int(numbers[0] + numbers[-1]) # add the first and last to get the calibration value
        total += calibration # then add it to the total

print(total)