N = int(input())
if N == 0:
    print(4)
elif N == 1:
    print(3)
else:
    S = str((3**N)*(5**(2*N-2)))
    n = len(S) + 1
    V = ['.'] + ['0' for _ in range(400)]
    for i in range(1, n):
        V[i] = S[-i]
    for i in range(2*N-2):
        V[i], V[i+1] = V[i+1], V[i]
    for i in range(max(2*N, n), 0, -1):
        print(V[i-1], end = '')
    print()