#! /usr/bin/env python3

C_MEMO = {}


def combination(n, r):
    if n == r:
        return 1
    elif r == 0:
        return 1
    elif r == 1:
        return n
    elif (n, r) in C_MEMO:
        return C_MEMO[n, r]
    C_MEMO[n, r] = combination(n-1, r-1) + combination(n-1, r)
    return C_MEMO[n, r]


def s1(p):
    n = 0
    for i in range(1, p + 1):
        n += 3 * 10 ** (i - 1)
    return n


def s2(p):
    n = 0
    for i in range(1, p + 1):
        ni = 10 ** (p - i) * combination(p, i) * (-1) ** i
        n -= ni
    return n


def s3(p):
    n = 0
    for i in range(1, p + 1):
        ni = (10 ** (p - i) // 3 + 1) * combination(p, i) * (-1) ** i
        n -= ni
    return n


def main():
    p = int(input())

    n1 = s1(p)
    n2 = s2(p)
    n3 = s3(p)

    print(n1 + n2 - n3)


if __name__ == '__main__':
    main()