MOD = 10**9+7
N = int(input())

def mat_mul(A, B):
    ans = [[0,0],[0,0]]
    for i in range(2):
        for k in range(2):
            for j in range(2):
                ans[i][j] = (ans[i][j] + A[i][k]*B[k][j]) % MOD

    return ans

def mat_pow(A, n):
    B = [[1,0],[0,1]]
    
    while n>0:
        if n&1:
            B = mat_mul(A,B)
        A = mat_mul(A,A)
        n >>= 1
        
    return B

A = [[1,1],[1,0]]

ans = mat_pow(A,N)

print((ans[1][0] * ans[0][0]) % MOD)