N=int(input())
d=[1]*N
if N%2==0:
    print(f"{2} {N//2-1}")
else:
    print(f"{1} {N//2}")
while True:
    t=int(input())
    if t==0:
        break
    k,x=map(int,input().split())
    print(f"{k} {N+2-x-k}")