import sys
input = sys.stdin.readline
from collections import *

N = 10**6
xy = [(-10**9, -10**9)]
add_y = 1

for _ in range(N-1):
    x, y = xy[-1][0]+1, xy[-1][1]+add_y
    xy.append((x, y))
    add_y += 1

print(N)

for x, y in xy:
    print(x, y)
    sys.stdout.flush()