with open("input") as f:
    instructions = [n.strip() for n in f.readlines()]

SOURCES = dict()

for instruction in instructions:
    print(instruction)
    [operation, wire] = instruction.split(" -> ")
    SOURCES[wire] = operation

print(SOURCES)


def evaluate_wire(wire):
    try:
        return int(wire)
    except ValueError:
        pass

    operation = SOURCES[wire]
    print("evaluating wire", wire, "; operation:", operation)

    parameters = operation.split(" ")

    result = None

    if "NOT" in operation:
        [_, a] = parameters
        result = evaluate_wire(a) ^ 0b1111111111111111
    elif "OR" in operation:
        [a, _, b] = parameters
        result = evaluate_wire(a) | evaluate_wire(b)
    elif "AND" in operation:
        [a, _, b] = parameters
        result = evaluate_wire(a) & evaluate_wire(b)
    elif "LSHIFT" in operation:
        [a, _, b] = parameters
        result = evaluate_wire(a) << evaluate_wire(b)
    elif "RSHIFT" in operation:
        [a, _, b] = parameters
        result = evaluate_wire(a) >> evaluate_wire(b)
    else:
        result = evaluate_wire(operation)

    SOURCES[wire] = str(result)
    return result


print(evaluate_wire("a"))
# for wire in ["d", "e", "f", "g", "h", "i"]:
#     print("==", wire, "==")
#     print(evaluate_wire(wire))
# print(SOURCES)

print("finish")