using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace tp2
{
    class Fraction
    {
        int num;
        int den;
        public Fraction(int a, int b) {
            num = a;
            den = b;
        }
        public static bool operator < (Fraction r1 , Fraction r2)
        {
            if (r1.num*r2.den < r1.den*r2.num)
                return true;
            else
                return false;
        }
        public static bool operator >(Fraction r1, Fraction r2)
        {
            if (r1.num * r2.den < r1.den * r2.num)
                return false;
            else
                return true;
        }
        public static  bool operator !=(Fraction r1, Fraction r2)
        {
            if (r1.num*r2.den == r2.num*r1.den)
                return false;
            else
                return true;
        }
        public static  bool operator ==(Fraction r1, Fraction r2)
        {
            if (r1.num * r2.den == r2.num * r1.den)
                return true;
            else
                return false;

        }
        //public static bool operator >=(Fraction r1, Fraction r2)
        //{
        //    if (r1.num * r2.den == r2.num * r1.den)
        //        return true;
        //    else
        //        return false;

        //}
        public static   operator +(Fraction r1, Fraction r2)
        {
            int num = r1.den * r2.den;
            int den = r1.num * r2.den + r1.den * r2.num;
            Fraction f3 = new Fraction(num, den);
            return f3;

        }
        public static  operator -(Fraction r1, Fraction r2)
        {
            int num = r1.den * r2.den;
            int den = r1.num * r2.den - r1.den * r2.num;
            Fraction f4 = new Fraction(num, den);
            return f4;

        }




    }

}