# computer = [3,0,4,0,3,0,4,0,99]
# computer = [1101,100,-1,4,0]
computer = [data here]
current_index = 0
while(current_index < len(computer)):
    if(computer[current_index] == 1):
        computer[computer[current_index + 3]] = computer[computer[current_index + 1]] + computer[computer[current_index + 2]]
        current_index += 4
    elif(computer[current_index] == 2):
        computer[computer[current_index + 3]] = computer[computer[current_index + 1]] * computer[computer[current_index + 2]]
        current_index += 4
    elif (computer[current_index] == 3):
        computer[computer[current_index + 1]] = int(input("input: "))
        current_index += 2
    elif (computer[current_index] == 4):
        print("output: ", computer[computer[current_index + 1]])
        current_index += 2
    elif (computer[current_index] == 99):
        break
    else:
        # be careful of comparing chars with ints
        opcode = str(computer[current_index])
        # third parameter always in position mode
        parameter_1_value = computer[current_index + 1] if opcode[1] == '1' else computer[computer[current_index + 1]]
        parameter_2_value = computer[current_index + 2] if opcode[0] == '1' else computer[computer[current_index + 2]]

        output_index = computer[current_index + 3]

        op = int(opcode[len(opcode) - 1])
        if(op == 1):
            computer[output_index] = parameter_1_value + parameter_2_value
            current_index += 4
        elif(op == 2):
            computer[output_index] = parameter_1_value * parameter_2_value
            current_index += 4

    # print(computer[current_index]) # 104 not a command thats why its getting stuck but how?