//2.1
/*#include <iostream>
#define _USE_MATH_DEFINES
#include <math.h>
using namespace std;
double V,R,r,h,S,l;
int main()
{
    cout<<"Enter nums"<<endl;
    cin>>r>>R>>h;
    if (h >0 and R>0 and r>0){
        l=sqrt((h*h+pow((R-r),2)));
        V = (M_PI * h * (pow(R, 2) + R * r + pow(r, 2)) / 3);
        S = M_PI * (pow(R, 2) + (R + r) * l + pow(r, 2));
        cout << S << " " << V;
    }
    else{
    cout<<"Введите числа больше нуля";
    }
    return 0;
}*/
//2.2
/*#include <iostream>
#define _USE_MATH_DEFINES
#include <math.h>
using namespace std;
float w,a,x;

int main()
{
    cout<<"Enter nums"<<endl;
    cin >> x>>a;
    if (x==0){
        cout<<"Error"<<endl;
        }
    else {
        if (abs(x) < 1) {
            w = a * log(abs(x));
            cout << abs(w);
        }
        else {
            if (a - pow(x, 2) < 0) {
                cout << "error\n";
            }
            else {
                w = sqrt(a - pow(x, 2));
                cout << abs(w);
            }
        }
    }
    return 0;
}*/