using System;

public class Fib {
 movable Compute( int n, Channel( int ) c ) {
  if ( n < 30 )
   c.Send( cfib( n ) );
  else {
   Fib f = new Fib();
   Compute( n - 1, f.c1 );
   c.Send( cfib( n - 2 ) + f.Get() );
  }
 }

 int Get() & Channel c1( int x ) { return ( x ); }

 private int cfib( int n ) {
  if ( n <= 1 )
   return 1;
  else
   return cfib( n - 1 ) + cfib( n - 2 );
 }
}

class ComputeFib {
 public static void Main( String[] args ) {
  int n = System.Convert.ToInt32( args [ 0 ] );

  ComputeFib cf = new ComputeFib();
  Fib fib = new Fib();

  fib.Compute( n, cf.c );
  Console.WriteLine( "For n = " + n + " value is " + cf.Get() );
 }

 int Get() & Channel c( int x ) { return x; }
}