adventofcode2023/day06-1.py

from functools import reduce

from helpers import Helper

helper = Helper(debug=True)
debug = helper.debug
load_input = helper.load_input

def main():
    lines = load_input(6)

    races = []

    times = []
    distances = []
    for line in lines:
        header, values_str = line.split(":")
        for value in values_str.split():
            if header == "Time":
                times.append(int(value))
            else:
                distances.append(int(value))

    for item in zip(times, distances):
        races.append({"Time": item[0], "Distance": item[1]})
                         
    # debug(races)

    ways_to_win = []
    for i, race in enumerate(races):
        win_ways = 0
        for held_time in range(race["Time"]):
            run_time = race["Time"] - held_time
            run_distance = run_time * held_time
            if run_distance > race["Distance"]:
                debug(f"I can win race {i} with time {held_time}ms (it'll run {run_time}ms at {held_time}mm/ms for {run_distance}mm total.)")
                win_ways += 1
        ways_to_win.append(win_ways)

    total_ways_to_win = reduce(lambda x,y: x*y, ways_to_win)

    print(f"Total ways to win all races: {total_ways_to_win} ({'*'.join([str(i) for i in ways_to_win])})")

if __name__ == "__main__":
    main()