from math import gcd

A=[]
for i in range(1,2230,2):
    for j in range(1,2230,2):
        if gcd(i,j)==1:
            A.append((i,j))

A.sort(key=lambda x:x[1]/x[0])

x=-10**9
y=-10**9

ANS=[]

for z,w in A:
    ANS.append(str(x)+" "+str(y))
    x+=z
    y+=w

    if len(ANS)==10**6:
        break

print(len(ANS))
print("\n".join(ANS))