#yuki1149
n=int(input())
if n%2:
 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))