N=int(input())
x=2*(10**6)
D=[0]*(2*x+2)
for i in range(1,2*x+2):
  d=i
  D[i]+=-1+i
  while d+i<=2*x:
    d+=i
    D[d]-=1
A=[]
n=x
for i in range(1,N):
  a,b=i,N-i
  if a>b:
    break
  d=abs(D[a]-D[b])
  if n==d:
    A.append((a,b))
    A.append((b,a))
  elif n>d:
    A=[]
    n=d
    A.append((a,b))
    A.append((b,a))
for a,b in sorted(A):
  print(a,b)