using System;

class Fraction: IComparable {
  int z, n;
  
  public Fraction(int z, int n) {
    this.z = z; this.n = n;
  }
  
  public static Fraction operator + (Fraction a, Fraction b) {
    return new Fraction(a.z * b.n + a.n * b.z, a.n * b.n);
  }
    
  public static Fraction operator * (Fraction a, Fraction b) {
    return new Fraction(a.z * b.z, a.n * b.n);
  }
  
  public int CompareTo(object obj) {
    Fraction f = (Fraction)obj;
    if ((float)z/n < (float)f.z/f.n) return -1;
    else if ((float)z/n > (float)f.z/f.n) return 1;
    else return 0;
  }
  
  public override string ToString() {
    return z + "/" + n;
  }
}

class Test {
  
  static void Main(string[] arg) {
    Fraction[] a = {
      new Fraction(3,5),
      new Fraction(8,3),
      new Fraction(1,2),
      new Fraction(4,6),
      new Fraction(7,5)
    };
    Array.Sort(a);
    foreach (Fraction f in a) Console.Write(f + " ");
    Console.WriteLine();
  }
  
}