Лабораторная №4 (возможно правильно)

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int x;
    cout<<"Insert your number: ";
    cin>>x;

    if (x>22&&x<11) // not F
    {
        if(x>22&&x<55) //G or other
        {
            cout<<"x belongs to G";
        }
        else //EB or other
        {
            if((x>5&&x<11)or(x>-7&&x<-3)) //E or B
            {
                if(x>5&&x<11)
                {
                    cout<<"x belongs to E";
                }
                else
                {
                    cout<<"x belongs to B";
                }
            }
            else //other if not A
            {
                if(x>-7) //not A
                {
                    if(x>0&&x<-3) //H or D if not C
                    {
                        if(x>55) //H
                        {
                            cout<<"x belongs to H";
                        }
                        else //D
                        {
                            cout<<"x belongs to D";
                        }
                    }
                    else //C
                    {
                        cout<<"x belongs to C";
                    }
                }
                else //A
                {
                    cout<<"x belongs to A";
                }
            }
        }

    }
    else
    {
        cout<<"x belongs to F";
    }

    return 0;
}