practice(1-2)

#include <iostream>
#include <math.h>
using namespace std;
int main()
/*{
    int x;
    float a, b;
    cin >> x;
    a = sqrt((2 * x + sin(abs(3 * x))) / 3.56);
    b = sin((3.2 + sqrt(1 + x)) / abs(5 * x));
    a = round(a * 100.0) / 100.0;
    b = round(b * 100.0) / 100.0;
    if ((2 * x + sin(abs(3 * x)) < 0) & ((x == 0) || (x < -1)))
        cout << "error error";
    else {
        if ((x == 0) || (x < -1))
            cout << a << " " << "error";
        else {
            if ((2 * x + sin(abs(3 * x))) < 0)
                cout << "error " << b;
            else
                cout << a << " " << b;
        }
    }
    return 0;
}

{
    int x;
    cin >> x;
    if (x % 10 == 0)
        cout << x / 10;
    else
        cout << x % 10 << x / 10;
}*/