import matplotlib.pyplot as plt

Y0 = 5000
Y1 = 4800
n = int(input())
Y = [Y0, Y1]
for i in range(2, n + 1):
    Y.append(500 + 1.8 * Y[i-1] - 0.9 * Y[i-2])

for i in range(0, n+1):
    print("Y", i, " = ", Y[i], sep="")

plt.plot(Y)
plt.ylabel('Yt')
plt.xlabel('t')
plt.show()