from lib import get_data, str_to_ints
from d9 import Amp

xs = str_to_ints(get_data(__file__))
first_255 = True
nat = None
y_prev = None

amps = []
for i in range(50):
    a = Amp(xs)
    a.feed(i)
    a.go()
    amps.append(a)

for j in range(1_000_000):
    was_active = False
    for i, a in enumerate(amps):
        a.go()
        if a.input_required:
            a.feed(-1)

        if len(a.outputs) > 0:
            was_active = True
            while len(a.outputs) < 3:
                a.go()
            addr = a.pop()
            x = a.pop()
            y = a.pop()
            if addr == 255:
                nat = (x, y)
                if first_255:
                    print(y)
                    first_255 = False
            else:
                amps[addr].feed(x)
                amps[addr].feed(y)

    if not was_active and nat is not None:
        x, y = nat
        if y == y_prev:
            print(y)
            exit()
        amps[0].feed(x)
        amps[0].feed(y)
        nat = None
        y_prev = y