from math import gcd
from functools import cmp_to_key
a=[]
for i in range(1,1300):
  for j in range(1,1300):
    if gcd(i,j)==1:
      a.append((i,j))

def get_frac(tuple1):
  return tuple1[1]/tuple1[0]

a.sort(key=get_frac)
currx=0
curry=0
ans=[currx,curry]
for i in range(10**6-1):
  currx+=a[i][0]
  curry+=a[i][1]
  ans.append(currx)
  ans.append(curry)
print(len(ans)//2)
print(' '.join(map(str,ans)))