import numpy as np


def find_sequence(N, Terms, coefficients, mod):

    #given the sequence in the form below:
    #[first K term] := a0,a1.......a(k-1)
    #[recurrence relation] := a(n+k)= b(k-1)*a(n+k-1)+....... b(0)*a(n)

    #Then,define Terms and coefficients as follows:
    #Terms := [a0....... ak]
    #coefficients :=[b0.....bk]

    # return a_n  %mod  in O(K**2 log N), which is much faster than matrix_binary_powering_method,which works in O(K**3 logN).
    #Note that mod*K<2**64 in order to avoid overflow error.

    assert len(Terms) == len(coefficients)
    K = len(coefficients)
    data = [N]
    while N:
        if N % 2 == 0:
            N = N//2
            data.append(N)
        else:
            N -= 1
            data.append(N)
    data.reverse()

    C = np.array([0]*K)
    old_C = np.array([0]*K)
    tmp_C = np.array([0]*K)
    Cs = np.array([[0]*K for _ in range(K)])
    cofs = np.array(coefficients)
    #C(0,i) の定義
    C[0] = 1
    for i in range(len(data)-1):
        now, nex = data[i], data[i+1]
        old_C *= 0
        old_C += C
        if nex == 1+now:
            C = old_C[K-1]*cofs
            C %= mod
            for i in range(1, K):
                C[i] += old_C[i-1]
            C %= mod
            continue
        else:
            for i in range(K):
                Cs[i] *= 0
            Cs[0] += C
            for i in range(1, K):
                Cs[i] = Cs[i-1][K-1]*cofs
                Cs[i] %= mod
                for j in range(1, K):
                    Cs[i][j] += Cs[i-1][j-1]
                Cs[i] %= mod
            C *= 0
            Cs = Cs.T
            for i in range(K):
                tmp_C = 0
                tmp_C = old_C*Cs[i]
                tmp_C %= mod
                C[i] = np.sum(tmp_C)
                C[i] %= mod
    ans = 0
    for i in range(K):
        ans += Terms[i]*C[i]
    ans %= mod
    return ans


def main():
    N = int(input())
    if N == 0:
        print(1)
    else:
        ans = find_sequence(N, [2, 2], [2, 2], 1000) 
        if N%2 == 0:
            ans -= 1
        print(ans % 1000)
    return

if __name__ == "__main__":
    main()