def ip():return int(input())
def mp():return map(int, input().split())
def lmp():return list(map(int, input().split()))
# 岩プロコン2 B No.3260 岩井スターグラフ
X, Y, N = mp()
for _ in range(N):
  u, v = mp()
  du, mu = divmod(u-1, Y)
  dv, mv = divmod(v-1, Y)
  # print(du, mu, dv, mv)
  ans = -1
  if du == -1:
    ans = mv + 1
  elif dv == -1:
    ans = mu + 1
  elif du == dv:
    ans = abs(mu - mv)
  else:
    ans = mu + 1 + mv + 1
  print(ans)