let Mod: Int64 = 1000000007

func matrix_multiply_2by2(_ A: [[Int64]], _ B: [[Int64]]) -> [[Int64]] {
    var result = Array(repeating: Array(repeating: Int64(0), count: 4), count: 4)
    
    result[0][0] = (A[0][0]*B[0][0] + A[0][1]*B[1][0])%Mod
    result[0][1] = (A[0][0]*B[0][1] + A[0][1]*B[1][1])%Mod
    result[1][0] = (A[1][0]*B[0][0] + A[1][1]*B[1][0])%Mod
    result[1][1] = (A[1][0]*B[0][1] + A[1][1]*B[1][1])%Mod
    
    return result
}

func power_matrix_2by2(_ A: [[Int64]], exponetioal n: Int64) -> [[Int64]] {
    if n == 0 {
        return [[1,0],[0,1]]
    }
    
    if n == 1 {
        return A
    }
    
    let half = power_matrix_2by2(A, exponetioal: n/2)
    let result = matrix_multiply_2by2(half, half)
    
    if n%2 == 1 {
        return matrix_multiply_2by2(result, A)
    }
    
    return result
}

if let n = Int64(readLine() ?? "") {
    print(power_matrix_2by2([[1,1],[1,0]], exponetioal: n)[1][0])
}