ANS=[(0,0)]
x=10**9
y=0

N=1000000
while len(ANS)<N:
    ANS.append((x,y))

    if len(ANS)%2==0:
        y+=1
    else:
        x-=1
        y+=1

print(N)
for x,y in ANS:
    print(x,y)