import std.stdio, std.algorithm, std.array, std.conv, std.typecons;

immutable p = 1000000007;

void main() {
	auto N = readln[0 .. $-1].to!ulong;
	auto M = Matrix(1, 0, 0, 1);
	auto A = Matrix(1, 1, 1, 0);
	auto power = 1UL;
	
	while (power <= N) {
		if ((N & power) != 0) M = multiply(A, M);
		A = multiply(A, A);
		power *= 2;
	}
	
	writeln((M[2] + M[3]) % p);
	
}

// 0 1
// 2 3
alias Matrix = Tuple!(ulong, ulong, ulong, ulong);

Matrix multiply(Matrix a, Matrix b) {
	return Matrix( (a[0]*b[0] + a[1]*b[2]) % p, (a[0]*b[1] + a[1]*b[3]) % p, (a[2]*b[0] + a[3]*b[2]) % p, (a[2]*b[1] + a[3]*b[3]) % p);
}