tag8 = open('input', 'r')

tag8 = [x.strip() for x in tag8]


def run_game():
    acc = 0
    zeiger = 0
    besucht = list()
    print('=' * 10, 'LOOP START', '=' * 10)
    while zeiger < len(tag8):
        if zeiger in besucht:
            print('=' * 10, 'LOOP END. loop detected', '=' * 10)
            return False

        zeile = tag8[zeiger]
        besucht.append(zeiger)

        instruction = zeile[0:3]
        number = int(zeile[4:])
        if instruction == 'jmp':
            zeiger += number
        else:
            zeiger += 1
        if instruction == 'acc':
            acc += number
        print(zeile, 'zeiger', zeiger)
    print('=' * 10, 'LOOP END. Terminated', '=' * 10)
    return acc


acc = False

for zeilennummer, zeile in enumerate(tag8):
    instruction = zeile[0:3]
    rest = zeile[3:]
    if instruction == 'nop':
        tag8[zeilennummer] = 'jmp' + rest
        acc = run_game()
        if acc:
            print(f'Success: Changed line {zeile} to jmp')
            break
        tag8[zeilennummer] = 'nop' + rest
    elif instruction == 'jmp':
        tag8[zeilennummer] = 'nop' + rest
        acc = run_game()
        if acc:
            print(f'Success: Changed line {zeile} to nop')
            break
        tag8[zeilennummer] = 'jmp' + rest
    print(f'Processed line {zeile}')


print('Acc nach der Schleife:', acc)