import math
N = 7
print(N)
for i in range(N):
    x = int(math.cos(math.radians(360*i/N))*10**9+0.5)
    y = int(math.sin(math.radians(360*i/N))*10**9+0.5)
    print(x,y)
print('',end='',flush=True)