def intcode(seq, offset=0):
    opcode = seq[0 + offset]
    if opcode == 99:
        return seq
    vals = [seq[seq[1 + offset]], seq[seq[2 + offset]]]
    index = seq[3 + offset]

    if opcode == 1:
        seq[index] = sum(vals)
        return intcode(seq, offset + 4)
    elif opcode == 2:
        seq[index] = vals[0] * vals[1]
        return intcode(seq, offset + 4)

    else:
        raise "invalid opcode"


with open("C:\Coding\Advent Of Code 2019\Day 2\input.txt") as input:
    sequence = list(map(int, input.read().split(",")))

sequence[1] = 12
sequence[2] = 2

print(intcode(sequence))