import sys
def input(): return sys.stdin.readline().rstrip()

X, Y, N = map(int, input().split())
ans = []
for _ in range(N):
    u, v = map(int, input().split())
    a, b = divmod(~-u, Y)
    c, d = divmod(~-v, Y)
    if u == 0:
        b = -1
    if a == c:
        ans.append(d-b)
    else:
        ans.append(d+b+2)

for a in ans:
    print(a)