Task5(A)

#include <iostream>

using namespace std;

int main() {
    double x, a = 2.0;
    cin >> x;
    _asm {
        fld x
        fld a
        fyl2x
        fld st
        frndint
        fsub st(1), st
        fxch st(1)
        f2xm1
        fld1
        fadd
        fscale
        fstp a
    }
    cout << a << endl;
    return 0;
}