N = int(input())
if N % 2 == 1:
    print(1, (N + 1) // 2)
else:
    print(2, N // 2)
while True:
    t=int(input())
    if t==0:
        exit(0)
    k,x=map(int,input().split())
    print(k,N-k+1-(x-1))