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

namespace FractionOp {
  class Fraction {
    public double c = 0;
    public double z = 0;

    public Fraction(int c, int z) {
      this.c = c;
      this.z = z;

    }

    public override string ToString() {
      return "(" + c.ToString() + "/" + z.ToString() + ")";
    }

    public static Fraction operator +(Fraction a, Fraction b) {
      Fraction t = new Fraction(1, 1);
      t.c = (a.c * b.z + a.z * b.c);
      t.z = a.z * b.z;
      Fraction.SetFormat(t);
      return t;
    }

    public static Fraction operator -(Fraction a, Fraction b) {
      Fraction t = new Fraction(1, 1);
      t.c = (a.c * b.z - a.z * b.c);
      t.z = a.z * b.z;
      Fraction.SetFormat(t);
      return t;

    }

    public static Fraction operator *(Fraction a, Fraction b) {
      Fraction t = new Fraction(1, 1);
      t.c = (a.c * b.c);
      t.z = a.z * b.z;
      Fraction.SetFormat(t);
      return t;

    }

    public static Fraction operator /(Fraction a, Fraction b) {
      Fraction t = new Fraction(1, 1);
      t.c = (a.c / b.c);
      t.z = a.z / b.z;
      Fraction.SetFormat(t);
      return t;
    }

    public static Fraction SetFormat(Fraction a) {
      double max = 0;
      if (a.c > a.z) {
        max = Math.Abs(a.z);
      } else {
        max = Math.Abs(a.c);
      }
      for (double i = max; i >= 2; i--) {
        if ((a.c % i == 0) & (a.z % i == 0)) {
          a.c = a.c / i;
          a.z = a.z / i;
        }
      }
      if ((a.z < 0)) {
        a.c = -1 * (a.c);
        a.z = Math.Abs(a.z);
      }
      return (a);
    }
  }
}