using System;
using System.Collections.Generic;
 
public class Test{
   public static void Main(){
      var ls = new LinkedList<String>();
      for(int i=0; i<10; i++){ls.AddFirst(""+(char)('A'+i));}
      f(ls);
   }
 
   static void f<T>(ICollection<T> c){
      f(c, c.Count);
   }
 
   static void f<T>(IEnumerable<T> c, int cnt){
      int ix=1;
      foreach(T et in c){
         Console.WriteLine("({0,3}% : {1}/{2}) {3}", ix*100/cnt, ix, cnt, et);
         ix++;
      }
   }
}

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