X,Y,N=map(int,input().split())
for i in range(N):
    U,V=map(int,input().split())
    if U==0 and V==0:
        print(0)
    elif U==0:
        print((V-1)%Y+1)
    elif V==0:
        print((U-1)%Y+1)
    #同じ腕の中なら単に差分
    elif (U-1)//Y==(V-1)//Y:
        print(abs(U-V))
    else:
        print((U-1)%Y+(V-1)%Y+2)