def get_sum(s, c, k, t):
    v = None
    for p in range(s, len(c), 2 * k + 1):
        print(p, end=' ')
        if v:
            t += 2 * k + 1
        else:
            v = 0
        v += c[p]
    if t < len(c):
        v = None
    print(' => ', v, 't=', t)
    return v
def turnOffTheLights(k, c):
    mm = None
    for s in range(k + 1):
        summ = get_sum(s, c, k, k + 1 + s)
        if not mm or (summ and mm > summ):
            mm = summ
    return mm