import sys

def print_num(num):
   print(num)
   sys.stdout.flush()

nk = input()
nk = nk.split(' ')
N = int(nk[0])
K = int(nk[1])

diff = K + 1
num = (N+1) % diff

while True:
    print_num(num)
    num += diff
    rival = int(input())
    if rival >= N:
        break