mod = 1000000007
eps = 10**-9


def main():
    import sys
    input = sys.stdin.readline

    fac = [1] * 21
    for i in range(1, 21):
        fac[i] = fac[i-1] * i

    X, N = map(int, input().split())
    P = [0] * N
    used = [0] * (N+1)
    for i in range(N):
        cnt = X // fac[N-i-1]
        for j in range(1, N+1):
            if not used[j]:
                if cnt == 0:
                    P[i] = j
                    used[j] = 1
                    break
                else:
                    cnt -= 1
        X %= fac[N-i-1]
    IP = [0] * N
    for i, p in enumerate(P):
        IP[p-1] = i+1
    ans = 0
    used = [0] * (N+1)
    for i, p in enumerate(IP):
        cnt = 0
        for j in range(1, N+1):
            if not used[j]:
                if j == p:
                    used[j] = 1
                    break
                else:
                    cnt += 1
        ans += cnt * fac[N-i-1]
    print(ans)


if __name__ == '__main__':
    main()